https://mclo.gs/JY49mK7#L3303

the issue persists
https://mclo.gs/pW4Euym

We will try the other suggestion by IThundxr. If that also doesn't help then i will leave it up to Lysine as they are our rendering god in the first place XD

Please try this one and see if it still happens - https://drive.google.com/file/d/1bLfHQUEXEsn9Y9gvmJ3Iv-8OaEQbrZ_C/view?usp=drivesdk
Posted it on my google drive for CF/Modrinth so that i dont deploy a build that doesnt actually fix anything

the file needs permission to view, could you make it public?

thats odd should have been public 😂 should be now though

unless the fixed version needs to be on the server too, it did not fix the issue

crash log

What caused this issue? Was it loading the world after the update or inserting a specific block into the block?

Was this a world with blocks that changed to multistates?
And if so did you enable to config option to convert them?

it crashed during gameplay after an update, presumably when loading a chunk

yes it was, I did not know there was a config allowing you to do that so no
I'd say that should probably be enabled by default

try enabling that option and reloading the world and see if that crash happens again

https://mclo.gs/fyVXXJL#L3330 once again, after enabling

Do you know what mod or whatever is using continuity? As thats the mod causing the issue but testing it by itself isnt causing me to crash

not entirely sure, but most copycat slabs work fine

that's just continuity wrapping models, not continuities fault here, you shouldn't be relying on a hash map here if your using one and instead use something like a Concurrent hash map or a map wrapped in Collections#synchronizedMap

actually you can probably get away with storing a new arraylist with the contents of materials.entrySet()

Please try the version just released on CF/Modrinth and if the crash still occurs please re-open the issue and we will try another fix

UNZIP ME Copycats-fabric.1.20.1-1.3.4-TEST.9339880.zip

Please try this version on both the server and clients. It's a client-only fix, but since it also includes some other fixes, it's better to install on the server as well to be safe.