Hello, I'm getting a crash when Piglins engage in combat, my testing encompasses Wither Skeletons but this could extend to other mobs.

Forge Version: forge-39.0.8

Steps to reproduce:

1. Create world
2. Enter the Nether
3. Spawn relevant entities (Piglins and a mob they will combat)

crash-2021-12-22_10.46.32-server.txt

Sorry about this, I hastily changed something to line up with Mojang's updated code, will be fixed in next release.

Fixed in latest release: https://www.curseforge.com/minecraft/mc-mods/sapience/files/3583929