Basically the same issue as described in #7, but on the mod version 1.4.1.

MC 1.17.1
Fabric API 0.37.1
sihywtcamd 1.4.1

Crash log: [removed]

Okay so I've been reading your crashlog and I just saw mcmobs-dp-1-17-1.zip datapack. Could you tell me what is it or link it?

Yep, it's this one. It adds unreleased mobs, such as warden and glutton, but they never spawn below 0.

Hmm okay, I'll fix that. I guess it crashes less often than before but still crash if the position is equal to 0... But I don't know how do you have the issue because when I create a world with the datapack, it never tries to spawn them because the mojang dapatack overrides every mob spawn. Do you do anything more?

Nope, I just log into my existing world and after a very short period of time (varies from 1 to 10min) I get a crash. Didn't try with new worlds as I'm playing on a server. Could it be because I don't use the official datapack, but rather this one?

This datapack seems to act the same way. Let me give it some tries, I'll check this

Thanks. Can't find out how you got evrything working in your world 😅 I'll release a version with spawn (normally) fixed in this issue so that you can test it for me if it doesn't bother you.

Yeah, sure, I will test it.

sihywtcamd-betatest.zip
This should work

Tested it for about 30min, just walking around, flying in creative and flying in spectator, especially around areas that previously caused a crash. So far seems to be fixed, I will let you know if the crash happens again. And I'll close the issue tomorrow if I still don't encounter a crash by then, unless you would like to close it now.

Thanks a lot!

Okay perfect, I will publish the fix on Curseforge soon then. You can still play with this version if you want, but I may add a change on the version I will release this afternoon. Have a nice day! =)