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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>
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<item>
            <title>[MC-1185] Some Mobs disappear after save&amp;quit and reload or after unloading/loading the chunk they are in</title>
                <link>https://bugs.mojang.com/browse/MC-1185</link>
                <project id="10400" key="MC">Minecraft: Java Edition</project>
                    <description>&lt;p&gt;I&apos;ve seen this bug on my test level where I put Mobs in glass cages. (to let me see how the new textures are on them).&lt;/p&gt;

&lt;p&gt;To reproduce it, make a glass cage 3 blocks high with only a space of 1 block in it:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Top view : 3x3 glass with a hole at the center&lt;/li&gt;
	&lt;li&gt;Side view : 3x4 glass with a hole of 3 blocks high at the center&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Create the following Mobs with their Spawn Egg inside cage:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;Witch : Can disappear&lt;/li&gt;
	&lt;li&gt;Ocelot : Can disappear&lt;/li&gt;
	&lt;li&gt;Blaze : Can disappear&lt;/li&gt;
	&lt;li&gt;Bats : Can disappear (and sometimes can pass through glass blocks)&lt;/li&gt;
	&lt;li&gt;Cave spider : Disappear&lt;/li&gt;
	&lt;li&gt;Villager : Can Can disappear&lt;/li&gt;
	&lt;li&gt;Silverfish : Can disappear&lt;/li&gt;
	&lt;li&gt;Enderman : Can disappear&lt;/li&gt;
	&lt;li&gt;Cow : Never disappear&lt;/li&gt;
	&lt;li&gt;Pig : Never disappear&lt;/li&gt;
	&lt;li&gt;Sheep : Never disappear&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;It happens when you walk far away and come back where the cages are.&lt;br/&gt;
Or, it can also happen after several quit/reload the level.&lt;/p&gt;</description>
                <environment>Not related to environnement</environment>
        <key id="12499">MC-1185</key>
            <summary>Some Mobs disappear after save&amp;quit and reload or after unloading/loading the chunk they are in</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="6">Works As Intended</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="sphax">Sphax</reporter>
                        <labels>
                            <label>mob</label>
                    </labels>
                <created>Mon, 29 Oct 2012 18:01:57 +0100</created>
                <updated>Mon, 7 Sep 2015 18:52:53 +0200</updated>
                            <resolved>Tue, 19 Feb 2013 21:23:19 +0100</resolved>
                                    <version>Minecraft 1.4.1</version>
                    <version>Minecraft 1.4.2</version>
                                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                            <comments>
                            <comment id="216390" author="ethanicus" created="Mon, 19 Jan 2015 19:48:52 +0100"  >&lt;p&gt;I&apos;m getting this, too. I spawn some zombies, creepers, skeletons and villagers, all spawned with the PersistenceRequired:1 tag, and yet when I come back, half of them are gone. If this is intended, it should really be changed, as there is no reason this should happen at this point.&lt;/p&gt;</comment>
                            <comment id="125085" author="richardblade" created="Sat, 14 Dec 2013 21:35:16 +0100"  >&lt;p&gt;I put villagers in holding cells inside the village itself so they wouldn&apos;t wander around for trading purposes, this is the second time, all of them have disappeared. first time i thought they were too far outside the village boundaries, so i destroyed those holding cells and put them all inside the village boundaries. I went to the end, got killed. and when i got back to the village, all the holding cells were empty again. it took me awhile to get all those villagers in those cells, and have them as suitable trading partners, now they are gone. this needs to be fixed. &lt;/p&gt;</comment>
                            <comment id="46612" author="bljat" created="Tue, 19 Feb 2013 21:23:19 +0100"  >&lt;p&gt;This works as intended an can be read up on the &lt;a href=&quot;http://www.minecraftwiki.net/wiki/Despawning#Despawning&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Minecraft Wiki.&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="44990" author="sphax" created="Sun, 10 Feb 2013 11:02:01 +0100"  >&lt;p&gt;I don&apos;t know if it&apos;s a bug or WAD because I remember that Notch said ALL mobs will be persistent in the future... Currently, I understand only some of them are persistent...&lt;/p&gt;</comment>
                            <comment id="25605" author="japhasca" created="Thu, 29 Nov 2012 01:20:09 +0100"  >&lt;p&gt;More specifically, most hostile mobs are non-persistent (meaning they despawn,) and most passive and trained mobs are persistent (meaning they remain in-game.)&lt;/p&gt;

&lt;p&gt;This is working as intended.&lt;/p&gt;</comment>
                            <comment id="18408" author="kalebtbacon" created="Mon, 5 Nov 2012 15:32:58 +0100"  >&lt;p&gt;This happens because minecraft unloads chunks meaning all animals, mobs in them are despawned.&lt;/p&gt;</comment>
                    </comments>
                <issuelinks>
                            <issuelinktype id="10102">
                    <name>Duplicate</name>
                                                                <inwardlinks description="is duplicated by">
                                        <issuelink>
            <issuekey id="24558">MC-10591</issuekey>
        </issuelink>
            <issuelink>
            <issuekey id="14768">MC-2900</issuekey>
        </issuelink>
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