When an Enderman turns passive (which seems to be due to MC-94730) they keep following the player, like in the now-fixed bug MC-96946

How to reproduce:

1. Follow the MC-94730's instructions
2. Walk away from the Enderman
3. → Notice the Enderman continues to follow the player by teleporting

Code analysis: (taken from MC-96946 and changed a bit, probably accurate here too)

> net.minecraft.entity.monster.EntityEnderman.AIFindPlayer is not reset when the Enderman stops being hostile