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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>[MCPE-21135] Game became almost uncontrollable due to huge lag in particulal area</title>
                <link>https://bugs.mojang.com/browse/MCPE-21135</link>
                <project id="10200" key="MCPE">Minecraft (Bedrock codebase)</project>
                    <description>&lt;p&gt;Hello,&lt;/p&gt;

&lt;p&gt;My survival world suddenly became unplayable due to lag in certain area around my initial spawn point where all my stuff is constructed. It lags so much that most time I can&apos;t even turn my player or place any block - any touch is interpleted as long touch. But I can move using arrows and when I move far enough from the area (I think about 60-80 blocks) lag dissapears and all works ok, just I return - again lag.&lt;/p&gt;

&lt;p&gt;It happened when I was trying to speed up my XP farm (using zombie spawner underground at about level 10) and killed a big slime (there is also slime chunk there). I thought it&apos;s because too much zombies spawned, but after hard tries I turned off the spawner and killed all zombies, but lag had not disappeared. Climbing up from the underground didn&apos;t help too.&lt;/p&gt;

&lt;p&gt;I tried to load/unload the world and the app several times. Two my other creative worlds works fine.&lt;/p&gt;

&lt;p&gt;Providing all my Minecraft PE files from iTunes so you can reproduce the bug.&lt;/p&gt;

&lt;p&gt;&lt;a href=&quot;https://drive.google.com/file/d/0B7AO0v4hK3VgbU5zNGpkS0NpZmM/view?usp=sharing&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://drive.google.com/file/d/0B7AO0v4hK3VgbU5zNGpkS0NpZmM/view?usp=sharing&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Please help! Don&apos;t want to loose a lot of work &lt;img class=&quot;emoticon&quot; src=&quot;https://bugs.mojang.com/images/icons/emoticons/smile.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;

&lt;p&gt;Thanks in advance.&lt;/p&gt;</description>
            <key id="167793">MCPE-21135</key>
            <summary>Game became almost uncontrollable due to huge lag in particulal area</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="5">Cannot Reproduce</resolution>
                                            <reporter username="davojan">David</reporter>
                        <labels>
                    </labels>
                <created>Tue, 11 Apr 2017 09:18:01 +0200</created>
                <updated>Wed, 9 May 2018 10:23:22 +0200</updated>
                            <resolved>Wed, 9 May 2018 10:23:22 +0200</resolved>
                                    <version>1.0.5.54</version>
                    <version>1.0.6.52</version>
                                                                        <votes>1</votes>
                                    <watches>1</watches>
                                                                            <comments>
                            <comment id="451117" author="mega_spud" created="Wed, 9 May 2018 10:23:22 +0200"  >&lt;p&gt;Cleaning up old tickets:  This ticket has not been updated recently (1 year+) so is being closed as &lt;em&gt;Cannot Reproduce&lt;/em&gt;.  If you feel this is still a valid issue then please comment, or create a new ticket following the &lt;a href=&quot;http://help.mojang.com/customer/portal/articles/801354-writing-helpful-bug-reports-for-minecraft&quot; title=&quot;How To Write helpful bug reports&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Issue Guidelines&lt;/a&gt;.&lt;/p&gt;

&lt;p&gt;&lt;b&gt;Quick Links&lt;/b&gt;:&lt;br/&gt;
&#128211; &lt;a href=&quot;http://help.mojang.com/customer/portal/articles/801354-writing-helpful-bug-reports-for-minecraft&quot; title=&quot;How To Write Awesome Tickets! &#128175;&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Issue Guidelines&lt;/a&gt; &amp;#8211; &#128172; &lt;a href=&quot;https://www.reddit.com/r/MCPE/&quot; title=&quot;Help From the Minecraft Community &#128377;&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Community Support&lt;/a&gt; &amp;#8211; &#128231; &lt;a href=&quot;https://feedback.minecraft.net/&quot; title=&quot;Feedback and Suggestions &#9997;&#65039;&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Feedback&lt;/a&gt; &amp;#8211; &#128214; &lt;a href=&quot;http://minecraft.gamepedia.com/Minecraft_Wiki&quot; title=&quot;Official Minecraft Wiki &#127891;&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;Game Wiki&lt;/a&gt;&lt;/p&gt;</comment>
                            <comment id="377939" author="davojan" created="Fri, 14 Apr 2017 15:06:37 +0200"  >&lt;p&gt;So, I was able to fix my world. It comes out, that I actually didn&apos;t kill those mobs locked in my XP farm chamber. So when I let them out (and they obviously killed my player due to lag) after respawning the game became playable again and I was able to kill them separately. I think there was about 30-50 zombies.&lt;/p&gt;

&lt;p&gt;But it should be still considered as a bug. As far as I know mob spawner should stop producing mobs after some limit of alive mobs reached, but when many of zombies were collected in 1x2 size chamber some of them started moving actively and I think that caused the lag. And then lag caused that the spawner didn&apos;t stop to produce zombies (I saw that they continue to spawn) even when there was too much of them and that&apos;s why it comes to even more lag.&lt;/p&gt;

&lt;p&gt;I hope that my world files will help @Mojang developers to optimize mobs movement or behaviour to prevent such problems for other players.&lt;/p&gt;</comment>
                            <comment id="377936" author="smeo00" created="Fri, 14 Apr 2017 14:38:47 +0200"  >&lt;p&gt;Confirmed on 1.1.0.3 Android 6.0.1&lt;br/&gt;
My favourite world which is two years old and sits around 450MB is completely unplayable.&lt;/p&gt;

&lt;p&gt;Related to &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-19964&quot; title=&quot;Massive lag when worlds are over 500mb&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-19964&quot;&gt;&lt;del&gt;MCPE-19964&lt;/del&gt;&lt;/a&gt; - Closed as WAI (SERIOUSLY??? @Mojang?????? Massive Lag = Works As Intended?)&lt;br/&gt;
Related to &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-21095&quot; title=&quot;Very laggy when move faster to un loaded chunks generated&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-21095&quot;&gt;&lt;del&gt;MCPE-21095&lt;/del&gt;&lt;/a&gt;&lt;br/&gt;
Related to &lt;a href=&quot;https://bugs.mojang.com/browse/MCPE-16977&quot; title=&quot;Massive lag!&quot; class=&quot;issue-link&quot; data-issue-key=&quot;MCPE-16977&quot;&gt;&lt;del&gt;MCPE-16977&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Generally there has been a massive increase in lag throughout each of 1.1.0.0, 1.1.0.1 and now in 1.1.0.3 the game has literally ground to a halt and this problem needs fixed.&lt;/p&gt;</comment>
                            <comment id="377305" author="coyt415" created="Tue, 11 Apr 2017 18:36:49 +0200"  >&lt;p&gt;I have found this to be true in the redstone mansion which is why I can&apos;t play it.&lt;/p&gt;</comment>
                    </comments>
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            <issuekey id="162694">MCPE-19964</issuekey>
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            <issuelink>
            <issuekey id="165297">MCPE-20380</issuekey>
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