The bug

When a zombie hit by skeleton's arrow, the zombie will aggressive to the skeleton, but when relog the world, the zombie will no longer aggressive to the skeleton. The most mobs are affected, only neutral mobs, piglins and piglins brutes are unaffected.

Steps to reproduce

1. Summon a zombie and a skeleton
2. Let the skeleton attack the zombie
3. The zombie is aggressive to the skeleton
4. Relogging the world
5. The zombie is no longer aggressive to the skeleton.