If Rabbit Tamer is installed and mobs eat out of a feeding trough the game crashes. No rabbits need to be tamed, seems to take multiple animals eating at the same time to trigger, haven't been experiencing crashes under any other circumstances, tested on a clean install with no other mods.

To reproduce:
-Build a fenced in area with a trough in the middle.
-Fill trough with any seeds.
-Spawn a chicken in the pen. Then another. Then another. You've probably crashed by now but if not spawn a few more
-If you try to load that world again you'll crash. It will still crash if you disable Quark. It will not crash if you disable Rabbit Tamer.

Versions:
Minecraft 1.16.5
Forge 36.0.15
Quark r2.4-303
AutoRegLib 1.6-47
Rabbit Tamer 1.5

[crash report]
[latest.log]

The issue has now been resolved on my end, I wasn't catching for the case of animals breeding without a player being assigned

It's fixed, thank you!