A Chiromaw took a 60 second tick on a server. It was not under the influence of any rings and no players actually saw the mob when playing, so it might be newly spawned.

Here is the main key point of the crash. The full report is in files.

at thebetweenlands.common.entity.mobs.EntityChiromaw.TickCentral_TrueOnUpdateTick(EntityChiromaw.java:62)

crash-2021-10-20_08.41.53-server.txt