Any time anyone encounters a Cavenic or Crazy Skeleton (regardless of dimension) as soon as it attempts to attack, the game (and server) crashes. If playing on Creative, there is no issues because the skeletons are not attempting to attack.

All potentially helpful version information
Minecraft 1.12.2
Forge 14.23.5.2838
Caverns II 1.12.2-v2.2.0
Bewitchment 1.12.2-0.0.20.8

Crash Report: https://paste.ee/p/1MkwI

This issue also has been reported to the Bewitchment dev.

#Um-Mitternacht/Bewitchment#438

Sorry, this was a Bewitchment issue, and we gave up on trying to use that mod because it's a buggy junkpile.

This issue is expired.