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    <title>Mojang Studios Jira</title>
    <link>https://bugs.mojang.com</link>
    <description>This file is an XML representation of an issue</description>
    <language>en</language>    <build-info>
        <version>9.12.2</version>
        <build-number>9120002</build-number>
        <build-date>10-01-2024</build-date>
    </build-info>


<item>
            <title>[MCPE-14467] Hostile mobs are spawning on/in transparent blocks like slabs, fences, glass, etc.</title>
                <link>https://bugs.mojang.com/browse/MCPE-14467</link>
                <project id="10200" key="MCPE">Minecraft (Bedrock codebase)</project>
                    <description>&lt;p&gt;I slabed off an area and put walls around hoping to prevent slime spawns in a some chunk area but they still spawn. I suspect that this might be related to &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-14022&quot; title=&quot;Covering roof of spawn chamber with bottom-half slabs severely reduces the spawn rate&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-14022&quot;&gt;&lt;del&gt;MCPE-14022&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</description>
            <key id="141477">MCPE-14467</key>
            <summary>Hostile mobs are spawning on/in transparent blocks like slabs, fences, glass, etc.</summary>
                <type id="1" iconUrl="https://bugs.mojang.com/secure/viewavatar?size=xsmall&amp;avatarId=18903&amp;avatarType=issuetype">Bug</type>
                                    <status id="5" iconUrl="https://bugs.mojang.com/images/icons/statuses/resolved.png" description="A resolution has been taken, and it is awaiting verification by reporter. From here issues are either reopened, or are closed.">Resolved</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="1">Fixed</resolution>
                                            <reporter username="auhsoj05">Joshua Michael Hess</reporter>
                        <labels>
                            <label>entity-spawning</label>
                            <label>fence</label>
                            <label>glass</label>
                            <label>mob</label>
                            <label>slab</label>
                            <label>transparent-block</label>
                    </labels>
                <created>Tue, 24 May 2016 19:35:31 +0200</created>
                <updated>Fri, 17 Feb 2023 06:39:55 +0100</updated>
                            <resolved>Fri, 6 Apr 2018 12:19:28 +0200</resolved>
                                    <version>0.14.3</version>
                    <version>0.15.0</version>
                    <version>0.15.4</version>
                    <version>0.15.90.0</version>
                    <version>0.15.7</version>
                    <version>0.15.90.1</version>
                    <version>0.15.90.2</version>
                    <version>0.17.0.2</version>
                    <version>1.0.0</version>
                    <version>1.0.2</version>
                    <version>1.0.4.11</version>
                    <version>1.0.5.54</version>
                    <version>1.0.7.0</version>
                    <version>1.1.0.8</version>
                    <version>1.1.5.0</version>
                    <version>1.2.0.18</version>
                    <version>1.2.0.25</version>
                    <version>1.2.0.31</version>
                    <version>1.2.0.81</version>
                    <version>1.2.1.1</version>
                    <version>1.2.2.3</version>
                    <version>1.2.3.3</version>
                    <version>1.2.3.6</version>
                    <version>1.2.13.6</version>
                    <version>1.2.13.8</version>
                    <version>1.2.13.10</version>
                                    <fixVersion>1.2.5.12</fixVersion>
                    <fixVersion>1.2.13.54</fixVersion>
                                                        <votes>47</votes>
                                    <watches>31</watches>
                                                                            <comments>
                            <comment id="602511" author="handlbar.rick@comcast.net" created="Fri, 15 Nov 2019 04:47:31 +0100"  >&lt;p&gt;Current issues with spawning on leaves and glass are being tracked as &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-54241&quot; title=&quot;Monsters spawn on leaves and glass&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-54241&quot;&gt;&lt;del&gt;MCPE-54241&lt;/del&gt;&lt;/a&gt;. You may want to upvote and/or watch that ticket instead. &lt;/p&gt;</comment>
                            <comment id="602510" author="zebulanstanphill@gmail.com" created="Fri, 15 Nov 2019 04:44:50 +0100"  >&lt;p&gt;@Brad Canney The issue with leaves and glass is being tracked at a new issue: &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-54241&quot; title=&quot;Monsters spawn on leaves and glass&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-54241&quot;&gt;&lt;del&gt;MCPE-54241&lt;/del&gt;&lt;/a&gt;.&lt;/p&gt;</comment>
                            <comment id="602505" author="wo1f spectre" created="Fri, 15 Nov 2019 04:26:50 +0100"  >&lt;p&gt;Oh sorry. I should have included an update there too. I&apos;ve removed the glass for 1/4 of my hole and The mobs don&apos;t spawn there. They most be spawning on the glass blocks&lt;/p&gt;</comment>
                            <comment id="602504" author="zebulanstanphill@gmail.com" created="Fri, 15 Nov 2019 04:23:46 +0100"  >&lt;p&gt;@Brad Canney, you should open a separate issue for mobs spawning on bedrock, since bedrock is not a transparent block.&lt;/p&gt;</comment>
                            <comment id="602472" author="wo1f spectre" created="Fri, 15 Nov 2019 01:16:44 +0100"  >&lt;p&gt;Update... Issue persists in beta 1.14.0.50.&lt;/p&gt;

&lt;p&gt;Mobs are also spawning on leaf blocks. (Dark oak and spruce for sure. Haven&apos;t tested others)&lt;/p&gt;</comment>
                            <comment id="593221" author="wo1f spectre" created="Mon, 21 Oct 2019 05:49:06 +0200"  >&lt;p&gt;This issue has re appeared in the latest beta. 1.14.0.2&#160;&lt;/p&gt;

&lt;p&gt;I&apos;ve got a giant hole with nothing but glasts and bedrock blocks on the bottom. At night, the hostile mobs still spawn..&#160; I&apos;ve attached a screen cap taken during the day, but you can see the slimes down there. The second is at night. The mobs are not easy to see. I have circled a few. &lt;br/&gt;
&lt;img src=&quot;https://bugs.mojang.com/images/icons/attach/noimage.png&quot; imagetext=&quot;20191020_234721.jpg|thumbnail&quot; align=&quot;absmiddle&quot; border=&quot;0&quot; /&gt; &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;246591_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/246591/246591_Screenshot_20191020-204016_Minecraft.jpg&quot; title=&quot;Screenshot_20191020-204016_Minecraft.jpg&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;246591&quot; file-preview-title=&quot;Screenshot_20191020-204016_Minecraft.jpg&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/246591/_thumb_246591.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;&lt;/p&gt;</comment>
                            <comment id="516006" author="mega_spud" created="Thu, 31 Jan 2019 13:35:04 +0100"  >&lt;p&gt;@&lt;a href=&quot;https://bugs.mojang.com/secure/ViewProfile.jspa?name=Bratamoli&quot; class=&quot;user-hover&quot; rel=&quot;Bratamoli&quot;&gt;Bratamoli&lt;/a&gt; Issues with the Legacy console editions need to be logged in the console edition (project key MCCE) section of the bug tracker: &lt;a href=&quot;https://bugs.mojang.com/projects/MCCE/summary&quot; class=&quot;external-link&quot; rel=&quot;nofollow&quot;&gt;https://bugs.mojang.com/projects/MCCE/summary&lt;/a&gt;,  as this section is for issues related to the Bedrock codebase (project key MCPE).&lt;/p&gt;</comment>
                            <comment id="515536" author="bratamoli" created="Tue, 29 Jan 2019 18:50:14 +0100"  >&lt;p&gt;I&apos;m playing the console edition (Xbox 360). I know it&apos;s on or after TU69-Aquatic Update; I believe it is TU73, because I do have the trial version of the Nightmare Before Christmas Texture Pack.&lt;br/&gt;
I am playing on Adventure Mode / Hard Difficulty (world created in Survival).&lt;br/&gt;
My seed is -2878103199665976685, and I found a zombie spawner at X 296 - Y 57 - Z 78.&lt;/p&gt;

&lt;p&gt;I placed half-slabs on the ground to limit the eligible spawn locations (I left open 3 in the 3 corners and 2 on the 2 far walls for mob spawning) and placed blocks above those spaces (with a 2-tall gap) to keep the spawned zombies stuck in place for carrot/potato/equipment farming. When I removed the torches, the zombies began spawning on the upside-down (lower-half) slabs.&lt;br/&gt;
I dug up the half-slabs and replaced the layer of cobblestone beneath them with glass blocks. The mobs spawned on the glass.&lt;br/&gt;
I crafted shears, got some leaves blocks from a nearby spruce tree and replaced the glass with leaves. The mobs spawned on the leaves. (I saved after the glass trial, but I did not save after the leaves trial, so the picture shows glass.)&lt;/p&gt;

&lt;p&gt;I am not seeing anything in the change logs to suggest they are now supposed to be spawning on transparent blocks. Please re-open this Issue and investigate or create a new Issue and reply to this with the new issue number (so I know where to find it).&lt;/p&gt;

&lt;p&gt;Thank you for your help,&lt;br/&gt;
Tony&lt;/p&gt;

&lt;p&gt;PS - I cannot confirm or deny if this is affecting any other versions or updates.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;197180_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/197180/197180_Load+Screen.jpg&quot; title=&quot;Load Screen.jpg&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;197180&quot; file-preview-title=&quot;Load Screen.jpg&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/197180/_thumb_197180.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;&lt;/p&gt;

&lt;p&gt;&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;197179_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/197179/197179_Zombie+Spawner.jpg&quot; title=&quot;Zombie Spawner.jpg&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;197179&quot; file-preview-title=&quot;Zombie Spawner.jpg&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/197179/_thumb_197179.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;&lt;/p&gt;</comment>
                            <comment id="448335" author="majellico" created="Sun, 22 Apr 2018 06:04:11 +0200"  >&lt;p&gt; &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;164113_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/164113/164113_Screenshot_20180421-205038.jpg&quot; title=&quot;Screenshot_20180421-205038.jpg&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;164113&quot; file-preview-title=&quot;Screenshot_20180421-205038.jpg&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/164113/_thumb_164113.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt; &lt;br/&gt;
Carpets do not prevent spawns as stated in 1.2.13 changelog&lt;br/&gt;
Android 1.2.13.60&lt;/p&gt;</comment>
                            <comment id="441871" author="iebo" created="Fri, 16 Mar 2018 19:44:01 +0100"  >&lt;p&gt;Issue still persists in 1.2.13.10&lt;/p&gt;
</comment>
                            <comment id="441749" author="iebo" created="Thu, 15 Mar 2018 23:02:18 +0100"  >&lt;p&gt;Mobs still spawning on slabs, stairs, glass, fence gates, etc.&lt;/p&gt;

&lt;p&gt;Windows 10 beta 1.2.13.8&lt;/p&gt;

&lt;p&gt;This is easily reproduced by opening a world in creative and using commands to fill in space with transparent blocks.&lt;/p&gt;</comment>
                            <comment id="441237" author="mega_spud" created="Tue, 13 Mar 2018 12:36:05 +0100"  >&lt;p&gt;Reopened ticket - mobs were spawning in on glass.  (They were spawning in on top-half slabs though, which is better than previously reported behaviour.)&lt;/p&gt;</comment>
                            <comment id="441113" author="iebo" created="Mon, 12 Mar 2018 18:48:20 +0100"  >&lt;p&gt;Mobs spawning on glass again in 1.2.13.6&lt;/p&gt;</comment>
                            <comment id="431150" author="mistahtokyo" created="Thu, 25 Jan 2018 17:46:09 +0100"  >&lt;p&gt;This fix has broken parity with Java. Before, mobs could and should have spawned on top slabs as it was a solid flush spawning surface for them. Now, mobs no longer spawn on top slabs. A proper fix would be mobs not spawning on bottom slabs, but spawning on top slabs.&lt;/p&gt;</comment>
                            <comment id="415577" author="aguindi" created="Sun, 29 Oct 2017 12:53:12 +0100"  >&lt;p&gt;I don&apos;t think this issue is fixed.  Endermen still spawn on the main island of the End (where the dragon spawns), even if the ENTIRE surface is covered with water.  They spawn on glass blocks and on top of the bedrock regardless of light level.  They do not spawn on bottom-placed slabs.  I have reported it.&lt;/p&gt;</comment>
                            <comment id="415512" author="handlbar.rick@comcast.net" created="Sun, 29 Oct 2017 02:10:42 +0200"  >&lt;p&gt;Joe Smith: A helper noted that your issue &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-28426&quot; title=&quot;Cumulative issue with Mobs/Monsters spawning&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-28426&quot;&gt;&lt;del&gt;MCPE-28426&lt;/del&gt;&lt;/a&gt; is a duplicate of this one because all the specific cases you listed could be the result of this issue. However, your assumption that mobs were spawning at too-high light levels would not be covered, so we need a test case that demonstrates that. I updated &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-28416&quot; title=&quot;GUI disappearing on Realms (probably caused by fences)&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-28416&quot;&gt;&lt;del&gt;MCPE-28416&lt;/del&gt;&lt;/a&gt; to request a clarification. Please answer there.&lt;/p&gt;

&lt;p&gt;This issue is specifically about spawning on transparent or non-solid blocks, and as far as we know that problem has been fixed, so this ticket will remain closed unless a counterexample is reported.&lt;/p&gt;</comment>
                            <comment id="415507" author="rockszo" created="Sun, 29 Oct 2017 01:47:22 +0200"  >&lt;p&gt;I don&apos;t agree with &apos;fixed.&apos;  They are spawning in any light levels..&lt;/p&gt;</comment>
                            <comment id="415506" author="rockszo" created="Sun, 29 Oct 2017 01:45:59 +0200"  >&lt;p&gt;I&apos;ve seen monsters spawn right next to torches and glowstone, so light levels should be checked too.&lt;/p&gt;</comment>
                            <comment id="414985" author="mega_spud" created="Thu, 26 Oct 2017 14:56:16 +0200"  >&lt;p&gt;The issues with spawning appear to be fixed in 1.2.5.12.&lt;/p&gt;

&lt;p&gt;the remaining issue with spiders spawning on leaves is being tracked at &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-26107&quot; title=&quot;Spiders spawn on leaves in Mushroom Island biome.&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-26107&quot;&gt;&lt;del&gt;MCPE-26107&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="414175" author="iebo" created="Tue, 24 Oct 2017 00:14:46 +0200"  >&lt;p&gt;This issue is fixed in 1.2.5.12!!!!!!!!!!!&lt;/p&gt;

&lt;p&gt;Tested in creative and survival.&lt;/p&gt;

&lt;p&gt;Mobs don&apos;t spawn on glass, slabs, stairs, fences, fence gates.&lt;br/&gt;
Only spiders spawn on leaf blocks.&lt;/p&gt;</comment>
                            <comment id="414080" author="airplay94" created="Mon, 23 Oct 2017 16:39:40 +0200"  >&lt;p&gt;Mobs are spawning on fence gates... &lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;149377_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/149377/149377_22.10.2017_15-35-01.png&quot; title=&quot;22.10.2017_15-35-01.png&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;149377&quot; file-preview-title=&quot;22.10.2017_15-35-01.png&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/149377/_thumb_149377.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt; &lt;/p&gt;</comment>
                            <comment id="413330" author="handlbar.rick@comcast.net" created="Thu, 19 Oct 2017 08:47:22 +0200"  >&lt;p&gt;Confirm still spawning on glass and leaves in 1.2.3.6.&lt;/p&gt;</comment>
                            <comment id="413176" author="junglebear" created="Wed, 18 Oct 2017 16:38:40 +0200"  >&lt;p&gt;Update 1.2.2 spawns on at least glass, carpets and stairs!&lt;/p&gt;</comment>
                            <comment id="410783" author="iebo" created="Wed, 4 Oct 2017 19:39:06 +0200"  >&lt;p&gt;Still happening in new update 1.2.2&lt;/p&gt;</comment>
                            <comment id="410529" author="ravenous" created="Tue, 3 Oct 2017 07:35:13 +0200"  >&lt;p&gt;Can confirm mobs are still spawning on glass, leaves, etc. I&apos;m on a realm server on xbox&lt;/p&gt;</comment>
                            <comment id="409640" author="handlbar.rick@comcast.net" created="Thu, 28 Sep 2017 22:02:41 +0200"  >&lt;p&gt;The problem returned in 1.2.1 for me.&lt;/p&gt;</comment>
                            <comment id="407673" author="iebo" created="Thu, 21 Sep 2017 17:04:56 +0200"  >&lt;p&gt;Still happening in 1.2 official release&lt;/p&gt;

&lt;p&gt;Windows 10&lt;/p&gt;</comment>
                            <comment id="406357" author="hhubs" created="Mon, 11 Sep 2017 14:06:51 +0200"  >&lt;p&gt;mobs still spawn on glass block, im currently in beta 1.2 build 9&lt;/p&gt;</comment>
                            <comment id="405880" author="handlbar.rick@comcast.net" created="Thu, 7 Sep 2017 05:13:21 +0200"  >&lt;p&gt;Although the changelog says nothing about fixing it, this doesn&apos;t seem to be happening any more for me since upgrading to 1.2.0.31/build 9. Yay! &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/biggrin.png&quot; height=&quot;16&quot; width=&quot;16&quot; align=&quot;absmiddle&quot; alt=&quot;&quot; border=&quot;0&quot;/&gt;&lt;/p&gt;</comment>
                            <comment id="405715" author="mathbud" created="Tue, 5 Sep 2017 14:13:51 +0200"  >&lt;p&gt;I guess there&apos;s no need to say that it is still happening in 1.1.5 since it is happening in 1.2, but I will anyway. I spent hours building a large area in the nether with bottom half slabs in my &quot;safe&quot; area and as the roof for a wither skeleton farm ala tango&apos;s design only to find mobs spawning in both the &quot;safe&quot; area and on the roof. I was already annoyed because blazes could see me over the walls that only wither skeletons were supposed to see me over, but the spawning on bottom half slabs is a huge issue for the farm. All of this is on top of discovering that fighting the wither absolutely destroys the game with lag which makes the entire farm a wasted effort anyway.&lt;/p&gt;</comment>
                            <comment id="405395" author="sol tempestus" created="Sun, 3 Sep 2017 11:04:41 +0200"  >&lt;p&gt;That is annoying, even after an update of 1.2.0.25, still a creeper spawn on my stair only roof and a spider spawn on tree leafs. I have to force myself to play peaceful mode. &lt;/p&gt;</comment>
                            <comment id="405274" author="handlbar.rick@comcast.net" created="Sat, 2 Sep 2017 16:44:35 +0200"  >&lt;p&gt;Affects 1.2.0.22 and 1.2.0.25.&lt;/p&gt;</comment>
                            <comment id="400147" author="mega_spud" created="Fri, 18 Aug 2017 16:04:59 +0200"  >&lt;p&gt;Still affects 1.2.0.18 according to various reports, including &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-25053&quot; title=&quot;Mobs spawning on glass&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-25053&quot;&gt;&lt;del&gt;MCPE-25053&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="385070" author="la7mela7me" created="Sat, 27 May 2017 00:03:28 +0200"  >&lt;p&gt;It&apos;s happening on iOS 10.2.1 as well.&lt;/p&gt;</comment>
                            <comment id="379911" author="depressed-pho" created="Wed, 26 Apr 2017 13:43:48 +0200"  >&lt;p&gt;Re-uploaded &quot;Mobs spawning on slabs.mcworld&quot; so you can choose the floor type from 16 different blocks.&lt;/p&gt;</comment>
                            <comment id="379872" author="zebulanstanphill@gmail.com" created="Wed, 26 Apr 2017 06:42:33 +0200"  >&lt;p&gt;Reuploaded &quot;Mobs spawning on slabs.mcworld&quot; to fix a mistake in the floor selection system.&lt;/p&gt;</comment>
                            <comment id="379814" author="depressed-pho" created="Tue, 25 Apr 2017 18:30:18 +0200"  >&lt;p&gt;Attached another test world: &quot;Mobs spawning on slabs.mcworld&quot;&lt;br/&gt;
On 1.0.7 mobs don&apos;t spawn on/inside the following blocks:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Bottom-half slabs (as expected)&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;And they spawn on/inside the following blocks:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;Glass (unexpectedly)&lt;/li&gt;
	&lt;li&gt;Signs (as expected)&lt;/li&gt;
	&lt;li&gt;Pressure plates (unexpectedly)&lt;/li&gt;
	&lt;li&gt;Hoppers (as expected)&lt;/li&gt;
	&lt;li&gt;Redstone dust (unexpectedly)&lt;/li&gt;
	&lt;li&gt;Stone (as expected)&lt;/li&gt;
	&lt;li&gt;Top-half slabs (as expected)&lt;/li&gt;
	&lt;li&gt;Tripwire hooks (unexpectedly)&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="379782" author="druggy79" created="Tue, 25 Apr 2017 11:33:26 +0200"  >&lt;p&gt;it does&lt;/p&gt;</comment>
                            <comment id="374869" author="hoosasnitch" created="Fri, 31 Mar 2017 02:58:12 +0200"  >&lt;p&gt;Confirmed to affect 1.0.4 on Win 10 64 bit. Not only slimes, but zombies, skeletons, spiders and creepers. Haven&apos;t seen witches yet but assume affects them too.&lt;/p&gt;</comment>
                            <comment id="355204" author="auhsoj05" created="Sat, 21 Jan 2017 06:13:54 +0100"  >&lt;p&gt;They can&apos;t completely ignore bottom half slabs because they prevent the mods from spawning beneath the block they are on as can be seen from bug 14022.&lt;/p&gt;</comment>
                            <comment id="355114" author="mega_spud" created="Fri, 20 Jan 2017 10:37:17 +0100"  >&lt;p&gt;Attached test world.  Notice the glass area too.&lt;/p&gt;</comment>
                            <comment id="352559" author="mega_spud" created="Thu, 5 Jan 2017 13:47:21 +0100"  >&lt;p&gt;I can get mobs to spawn on bottom-half slabs when they are on another block; it&apos;s as if they ignore the half slab entirely.  They also spawn inside glass that is on another solid block, again, ignoring the glass.&lt;/p&gt;</comment>
                            <comment id="351858" author="claudiuchc" created="Mon, 2 Jan 2017 12:07:16 +0100"  >&lt;p&gt;Version 1.0 , mobs still spawn on bottom half slabs here is a video to prove it &lt;br/&gt;
&lt;a href=&quot;https://youtu.be/MYU1bt0r_DY&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://youtu.be/MYU1bt0r_DY&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="347645" author="syntaxerror999" created="Wed, 7 Dec 2016 01:27:44 +0100"  >&lt;p&gt;If you are refering to upside down half slabs (where the slab makes up the top half of the block area rather than the bottom half), this is normal. Mobs can spawn on these. &lt;/p&gt;</comment>
                            <comment id="345801" author="mega_spud" created="Thu, 24 Nov 2016 16:50:16 +0100"  >&lt;p&gt;Confirmed to affect 0.17.0.2 &lt;/p&gt;

&lt;p&gt;Tested on Samsung TabPro SM-T520 on Android 4.4.2&lt;/p&gt;</comment>
                            <comment id="344540" author="576874" created="Fri, 18 Nov 2016 17:11:08 +0100"  >&lt;p&gt;I cannot reproduce this bug on v.0.16.1 on the hard difficulty testing with bottom half slabs, glass and glass with carpet. With a night vision effect for visibility. Fences to prevent mobs getting into the testing area.&lt;/p&gt;


&lt;p&gt;On a NVIDIA Shield K1 with Android 6.0.1.&lt;/p&gt;

&lt;p&gt;&lt;em&gt;See image &quot;20161118&quot; for the testing area for this bug&lt;/em&gt;&lt;/p&gt;</comment>
                            <comment id="344291" author="aman4700" created="Fri, 18 Nov 2016 05:34:32 +0100"  >&lt;p&gt;This is a bulk resolve of issues that haven&apos;t been updated to 0.16.0+ yet. Please comment below (To open the ticket) and update your affected versions. If you cannot reproduce the bug, please write in the comments so we can resolve it as &quot;Cannot Reproduce&quot;. Thank You!&lt;/p&gt;</comment>
                            <comment id="329478" author="nighter" created="Tue, 13 Sep 2016 12:23:02 +0200"  >&lt;p&gt;This bug has been reported to our internal bug tracker for further testing and a fix. It is scheduled to be fixed in one of the future updates (no specific date can be provided). &lt;/p&gt;</comment>
                            <comment id="328679" author="dakotahawkins" created="Mon, 5 Sep 2016 17:36:05 +0200"  >&lt;p&gt;I tested in Win10 0.15.7: built 4 darkened spawn rooms with floors of half-slabs, glass, half-slabs+carpet, and glass+carpet. The only one to spawn anything was the room with half-slab floors, several hostile mobs spawned pretty quickly.&lt;/p&gt;</comment>
                            <comment id="325609" author="maplemale" created="Tue, 16 Aug 2016 17:53:57 +0200"  >&lt;p&gt;I have a railroad track built 100% on half slabs 4 blocks below the build limit. All blocks within 1000 spaces horizontally and 60 vertically are half slabs. Hostile mobs spawn on it. Also, I have a roof that is 100% half slabs and my nearby golem farm spawns golems on it. Not sure if golems are considered hostile or passive.&lt;/p&gt;</comment>
                            <comment id="324516" author="druggy79" created="Wed, 10 Aug 2016 08:08:58 +0200"  >&lt;p&gt;They do spawn, so i had to change to bottom half-slabs to a leaves, or put carpets on it, whcih looks a bit awkward (Bottom half-slab with a carpet on it) but at least it does prevents the spawn.&lt;br/&gt;
I posted the issue i believe, with screenshots&lt;/p&gt;</comment>
                            <comment id="324510" author="depressed-pho" created="Wed, 10 Aug 2016 06:04:15 +0200"  >&lt;p&gt;Strangely enough, I cannot see any non-slime hostile mobs spawning on top of bottom-half slabs in 0.15.4.&lt;br/&gt;
I made an 8x8 spawn pad and stood 24 blocks away from it in a flat world. Mobs did not spawn at all no matter how long I waited for. I haven&apos;t tested for slimes yet.&lt;/p&gt;</comment>
                            <comment id="324405" author="auhsoj05" created="Tue, 9 Aug 2016 15:02:52 +0200"  >&lt;p&gt;It still effects 15.4&lt;/p&gt;</comment>
                            <comment id="323854" author="aman4700" created="Mon, 8 Aug 2016 03:49:28 +0200"  >&lt;p&gt;Please respond and add the current version if you can reproduce this issue.&lt;/p&gt;</comment>
                            <comment id="323407" author="druggy79" created="Fri, 5 Aug 2016 17:54:17 +0200"  >&lt;p&gt;Happens for me too, annoying&lt;/p&gt;</comment>
                            <comment id="307678" author="illidicia" created="Thu, 26 May 2016 17:50:29 +0200"  >&lt;p&gt;Reopened.&lt;/p&gt;</comment>
                            <comment id="307676" author="auhsoj05" created="Thu, 26 May 2016 17:20:02 +0200"  >&lt;p&gt;Because of 14022 I suspected that this might be part of a more general bounds checking bug which would affect all mobs, but I had only seen the slimes spawn on the bottom slabs. &lt;/p&gt;</comment>
                            <comment id="307673" author="mega_spud" created="Thu, 26 May 2016 17:12:25 +0200"  >&lt;p&gt;I think this bug might be more far reaching than just just Slimes.&lt;/p&gt;

&lt;p&gt;I covered a fenced off 22x22 area of bottom-half slabs where I had seen a slime spawn on a flat world.  &lt;/p&gt;

&lt;p&gt;I couldn&apos;t get a slime to spawn (possibly needed more time!) but other mobs were spawning on the half slabs as pictured:&lt;br/&gt;
&lt;span class=&quot;image-wrap&quot; style=&quot;&quot;&gt;&lt;a id=&quot;117868_thumb&quot; href=&quot;https://bugs.mojang.com/secure/attachment/117868/117868_scrnsht153.jpg&quot; title=&quot;scrnsht153.jpg&quot; file-preview-type=&quot;image&quot; file-preview-id=&quot;117868&quot; file-preview-title=&quot;scrnsht153.jpg&quot;&gt;&lt;img src=&quot;https://bugs.mojang.com/secure/thumbnail/117868/_thumb_117868.png&quot; style=&quot;border: 0px solid black&quot; role=&quot;presentation&quot;/&gt;&lt;/a&gt;&lt;/span&gt;&lt;/p&gt;</comment>
                            <comment id="307616" author="thebigsmilexd" created="Thu, 26 May 2016 15:17:27 +0200"  >&lt;p&gt;Tested on bottom slabs and confirmed.&lt;/p&gt;</comment>
                            <comment id="307114" author="auhsoj05" created="Wed, 25 May 2016 03:52:03 +0200"  >&lt;p&gt;I know that top slabs don&apos;t prevent spawns those are all bottom slabs and the slimes still spawn. Please reopen. &lt;/p&gt;</comment>
                            <comment id="307112" author="depressed-pho" created="Wed, 25 May 2016 03:43:13 +0200"  >&lt;p&gt;Top-half slabs don&apos;t prevent any mobs from spawning. Only bottom-half ones do.&lt;br/&gt;
See &lt;a href=&quot;http://minecraft.gamepedia.com/Spawn#Spawn_conditions&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://minecraft.gamepedia.com/Spawn#Spawn_conditions&lt;/a&gt;&lt;/p&gt;</comment>
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