Entering certain chunks causes FPS drops

Thank you for your report!
However, this issue is Invalid.

Your game, launcher or server is modified.
If you can reproduce the issue in a vanilla environment, please recreate the issue.

• Any non-standard client/server/launcher build needs to be taken up with the appropriate team, not Mojang.

• Any plugin issues need to be addressed to the creator of the plugin or resource pack.

• If you have problems on large servers, such as The Hive and Hypixel, please contact them first as they run modified server software.

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I've added a video with the bug in Vanilla. How do I get a mod to change the status?

By commenting on the ticket 😉

To reproduce the ticket more easily, could you please attach the (zipped) world file to this ticket? If the file size is too large, please upload it somewhere else and then link to it here.

_{This issue has been temporarily closed as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.}

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Commenting again to say I've edited the description with a link to the world: https://drive.google.com/file/d/1Jeur5KxOR-RIPLqB71wrV1g0cFDnzz3S/view?usp=sharing

I forgot to mention that restarting seems to temporarily fix the issue. Maybe another program causes this?

Hmm. I can confirm that there's a medium to massive massive lag spike when entering that chunk, especially when coming from that cave-ish room.

Generally, when crossing chunk borders in that world, there seems to be a lag spike.
Disabling the BlingEdit data pack doesn't seem to change anything.

What exactly causes this lag I couldn't find out due to MC-158870.

 I am also experiencing this on my Minecraft server, there are like 40 chunks where this issue occurs, every time I step in any of those chunks my game freezes. Currently playing on 1.14.4, this issue didn't occur before 4 hours ago and my server is opened for 3 days. I really hope this is fixed for 1.15

Hi! checking in from 1.15.2, we have this exact issue on our server. Normally hosted and Vanilla,

For us it's actually a big old square of chunks. seems to be about 33x37 chunks big, entering from outside these chunks looks just like the author's video.

Essentialy lag spike when you enter chunk, go back further and forward again, no spike. but go back one chunk over the spiked chunk wall and back again, boom, spike.

Really odd issue, our "walls" seems to be at chunk xyz: X-665, Z-51, X-631, Z-13. draw a line between these chunks and you have the chunk spike square

Checking back in from 2020 1.15.2. I have about a 20x20 Chunk Square that causes lag when you enter, place about 10 blocks or every 10 seconds. The issue is on all brands of CPUs and GPUs as well as ram allocation. Tried solving with external means (spigot/bukkit) tho this issue is consist throughout the forks and versions

This bug is happening to me as well, using both the vanilla client and OptiFine, and using vanilla server software and Paper. This only happens when another player is in a "bad" chunk as I show in this video:

https://youtu.be/4KWEhn3y-rw

Also, it doesn't appear to be strictly an FPS or render issue, as other players actually see the stuttering player rubber band. Watch my friend rubberband going back and forth through a chunk border in this video:

https://youtu.be/3-rpttcUIm4

We reduced the RAM allocated to the server and that didn't fix it. 

Happens on 1.15.2 vanilla and Paper as well, it's been present since at least 1.14.4. 

@unknown, please create a new ticket and include as much information as possible.

E: We actually already have a ticket for this in 1.15.2: MC-162253