If an enderman is provoked by a player in the end. And the player goes back to the overworld. Enderman will keep attacking the player if the player's coordinate is reachable in the end (But the player is in the overworld, and the enderman is in the end).

I have tried in Vanilla server. It cannot be reproduced. But it can be reproduced on both Spigot and paper servers. I have used seed 3177312054429374794. The spawnpoint in the overworld is near (0,0) which can be reached at the same coordinate in the end.