Mobs do not retaliate against ghasts

The bug

Mobs do not retaliate against ghasts.

To reproduce

1. Summon a ghast
2. Summon any other hostile/neutral mob
3. Switch into survival mode
4. Let the ghast hit the mob
5. → Observe. It still goes for you, not for the ghast.

Code analysis

Code analysis by [Mod] ampolive can be found in this comment.