<!-- 
RSS generated by JIRA (9.12.2#9120002-sha1:301bf498dd45d800842af0b84230f1bb58606c13) at Sun Jan 12 11:55:49 UTC 2025

It is possible to restrict the fields that are returned in this document by specifying the 'field' parameter in your request.
For example, to request only the issue key and summary append 'field=key&field=summary' to the URL of your request.
-->
<rss version="0.92" >
<channel>
    <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>[MC-1836] Mobs glitch through half slabs and unsync between server and client</title>
                <link>https://bugs.mojang.com/browse/MC-1836</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;Mobs sometimes glitch when walking across a floor made of half slabs without anything under it. I&apos;ve directly seen two results, and believe there is a third one:&lt;/p&gt;

&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;More commonly, a &quot;ghost&quot; of the mob drops through the half slab floor; it can&apos;t be attacked or interacted with in any way. It sometimes makes yo-yo movements and after a time jumps to where he fell from. Appears to happen when the mob glitches only on the client.&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Less commonly, the mob really drops through the floor.&lt;/li&gt;
&lt;/ul&gt;


&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;I believe sometimes the glitch happens only server-side; I&apos;ve been hounded by invisible skeletons under my mob grinder completely made of half-slabs. Not sure, though, because I obviously can&apos;t see the invisible skeletons falling through the floor.&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Saw all the above problems in Survival, in a heavily modded game, when I made a mob grinder almost entirely out of half slabs in a Skyblock-like map in order to save materials; reproduced the ghost mobs issue on Creative, in both Vanilla 1.4.2 and the 1.4.3 pre-release. The other issues are way rarer.&lt;/p&gt;

&lt;p&gt;The attached file is a creative world with a copy of my mob grinder entirely made of half slabs; I typically see a few ghost mobs in less than a minute after loading that world.&lt;/p&gt;</description>
                <environment>Windows 7, Java 1.7.0_05</environment>
        <key id="13207">MC-1836</key>
            <summary>Mobs glitch through half slabs and unsync between server and client</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="3">Duplicate</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="schmidtcapela">Fabio Oliveira Schmidt Capela</reporter>
                        <labels>
                    </labels>
                <created>Fri, 2 Nov 2012 04:18:30 +0100</created>
                <updated>Thu, 1 Jun 2017 22:09:03 +0200</updated>
                            <resolved>Wed, 21 Nov 2012 01:14:34 +0100</resolved>
                                    <version>Minecraft 1.4.2</version>
                    <version>Minecraft 1.4.3</version>
                                                                        <votes>1</votes>
                                    <watches>3</watches>
                                                                            <comments>
                            <comment id="23405" author="bljat" created="Mon, 19 Nov 2012 21:50:52 +0100"  >&lt;p&gt;Duplicate of &lt;a href=&quot;https://bugs.mojang.com/browse/MC-119&quot; title=&quot;Mobs visually sinking through solid blocks&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MC-119&quot;&gt;&lt;del&gt;MC-119&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="17040" author="jfivat" created="Fri, 2 Nov 2012 11:20:44 +0100"  >&lt;p&gt;Confirmed, I saw a pigman into my nether base that was actually on the roof (half slabs).&lt;/p&gt;</comment>
                            <comment id="17026" author="shelter" created="Fri, 2 Nov 2012 10:46:39 +0100"  >&lt;p&gt;Confirmed, I&apos;ve seen this too.&lt;br/&gt;
Spiders tend to drop under the halfslabs making them hard to kill.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="11364">MC-119</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                            <issuelinktype id="10103">
                    <name>Relates</name>
                                            <outwardlinks description="relates to">
                                        <issuelink>
            <issuekey id="101224">MC-73302</issuekey>
        </issuelink>
                            </outwardlinks>
                                                        </issuelinktype>
                    </issuelinks>
                <attachments>
                            <attachment id="11810" name="Half Slab Mob Glitch.7z" size="30633" author="schmidtcapela" created="Fri, 2 Nov 2012 04:18:30 +0100"/>
                    </attachments>
                <subtasks>
                    </subtasks>
                <customfields>
                                                                                                                                                                <customfield id="customfield_10701" key="com.atlassian.jira.plugin.system.customfieldtypes:datetime">
                        <customfieldname>CHK</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>Mon, 19 Nov 2012 21:55:00 +0100</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_10500" key="com.atlassian.jira.plugin.system.customfieldtypes:radiobuttons">
                        <customfieldname>Confirmation Status</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="10300"><![CDATA[Unconfirmed]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                        <customfield id="customfield_11700" key="com.atlassian.jira.plugins.jira-development-integration-plugin:devsummary">
                        <customfieldname>Development</customfieldname>
                        <customfieldvalues>
                            
                        </customfieldvalues>
                    </customfield>
                                                                                                                        <customfield id="customfield_10501" key="com.atlassian.jira.plugin.system.customfieldtypes:radiobuttons">
                        <customfieldname>Game Mode</customfieldname>
                        <customfieldvalues>
                                <customfieldvalue key="10304"><![CDATA[Survival]]></customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                            <customfield id="customfield_11100" key="com.atlassian.jira.plugin.system.customfieldtypes:float">
                        <customfieldname>Linked</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>1.0</customfieldvalue>
                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                <customfield id="customfield_11600" key="com.pyxis.greenhopper.jira:gh-lexo-rank">
                        <customfieldname>Rank</customfieldname>
                        <customfieldvalues>
                            <customfieldvalue>0|i0mq0v:</customfieldvalue>

                        </customfieldvalues>
                    </customfield>
                                                                                                                                                                                                                                                                                                                                                                                    </customfields>
    </item>
</channel>
</rss>