How to reproduce this bug:
Launch Minecraft with these arguments: -DMC_DEBUG_ENABLED -DMC_DEBUG_BRAIN
Load / Spawn a flying mob
You should expect it to start pathfinding normally, but the game suddenly crashes.
MC-302089
Game crashes when flying mobs start pathfinding in debug mode
Resolved
Fixed
0
Please do note: (from the 25w37a changelog)
Features not guaranteed to work as intended
It might crash your game or corrupt your worlds
I’m not exactly sure how Mojang will handle this, but I think there is a high possibility that this will be resolved as Invalid.