I've been playing on a vanilla snapshot server with friends, when I encountered a bug where chunks would fail to update / save after blocks were placed or removed. This is only effecting a select few chunks.
In the screenshots you can see me place two grimstone blocks down. After this, I leave the server and rejoin, the pillar is gone and I am missing my two grimstone blocks.
This effectively makes this area impossible to build in, as anything you place is lost once you leave. I'm not sure why chunks are straight up not updating or saving, I did nothing out of the ordinary.
I have tried to restart the server to fix the issue, but it persists even after that.
EDIT: I have tested this further, and after I killed myself in game from fall damage, the issue no longer occurs. I have no idea what caused it to trigger in the first place, but it definitely seems like a pretty big issue as you can easily obtain infinite resources with it if you figure out how to purposefully trigger it.
Related issues
is duplicated by
MC-215815
My build just dissappear!
MC-215931
when going through a nether portal the chunks reset
MC-216570
diamonds being rolled back
MC-217541
Nether Glitch
MC-219026
Corrupting Chunks
MC-219323
Progress in nether occasionally is not saved
MC-219487
Desert temple resets 21w10a
MC-220017
chunk setbacks/not saving
MC-220210
Chunks don't get saved properly
MC-220568
World Progress can't be made
MC-220682
Duplication Glitch
MC-221388
Builds reverting to natural state.
MC-222122
Savestate bug
MC-222196
Weird chunk saving
MC-222406
only half of constructions
MC-222424
only half of constructions
MC-222426
only half of constructions
MC-222687
Chunks Reset to a different seed during a client lag spike on a boat.
MC-222935
Chunks Reseting/Regenerating
MC-223041
Chunk reseting placed/destroyed blocks after relog
MC-223081
Resources and blocks duped/lost when leaving an area "too quickly"
MC-223128
Chunks disappear
MC-223965
Unlimited Anvils
MC-224080
Chunk Saving Error
MC-224596
Dimension setback upon unloading
relates to
Attachments
Comments
migrated
tryashtar
Hmm, sounds similar to MC-216570. There may be something to this
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I experienced this bug a couple of times in a 21w11a server.
I also noticed that tile entities such as hoppers or furnaces were not updating, staying frozen in time while block interactions like placing water and having it flow would work just fine.
Leaving the server and joining back caused the chunks to "wake up" but all data on those chunks rolled back and progress didn't save.
Mask3D_WOLF
Relates to MC-63
migrated
BlaCoiso, confirm. This problem often appears on the vanilla server 21w11a.
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So the same happens to me, now after regenerating the chunks, they stay (at least until now).
I play single player. Also a whole village dissapeared.
migrated
Wait, if a village disappeared too, it must affect world gen in some way.
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How 1.16.5 is affected?
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We have been running Snapshots as a Server and can confirm this happens in parallel to furnaces, hoppers, chest, sticky pistons, etc breaking.
(Would venture to say this has been present in the first few snapshots and up until now has not been patched)
Manually running /save-all helps with fixing broken chunks (Regarding not saving) but furances, hoppers, chest, stickypistons, etc.. is less deterministic (Usually relogging, leaving the chunk, coming back sometimes fixes it)
Still Effects 21w17a
migrated
My experience with this is that chunks are not reliably saved when going through a nether portal. Frequently items that were placed or blocks that were broken immediately going through the nether portal are reset when you return.
affects 21w14a