The tamed rats on our server are behaving belligerently.
Mob filters are going blank as soon as you exit the GUI and when placed into a rat the rat will attack the first thing they see including players and player tamed mobs.

Version 1.20.1-8.1.2

Forge 47.3.0

this will be fixed in 8.1.3 once I release it to CurseForge. I fixed this issue months ago in dev but never got around to releasing a build as life has kept me very busy this year