What I expected to happen was...:
The burning piglin will just zombify and stop burning

What actually happened was...:
The game crushed at the second he was supposed to zombify

Steps to Reproduce:
1. Get a Piglin to the overworld
2. Make him burn (By Flint and still or by fire aspect just anything that will make him burn)
3. If he is still burning when he zombify the game crushes