Describe the bug

When having both mods installed (Spawn Animations and Hostile Mobs Improve Over Time) some mobs spawn immortal.

Steps to reproduce

1. You should be in survival mode (in creative you can kill the mob for some reason)
2. Passive/spawner mob spawn (noticed zombie, husks, skeleton)
3. Approximately every 50th mob spawns immortal when on 100th lvl of the Hostile Mobs Improve Over Time mod

Expected behavior

No response

Additional context

Minecraft 1.20.1 Forge 47.2.20

Interesting, I'll take a look at that. Thank you for the report.