Player A = originally generated the world
Player B and C = played this world in local multiplayer with A
Now the world was exported / imported to the faster computer of player B.

1. If now A and B go in the same chunk, instandly both game crashes. With A + C or B + C all fine!
2. With distance between the players: player B gets the damage of A. It depends not player C.

This Issue is on local multiplayer and realm, with the difference that on realm player C is not touched from the game crash.
Tried out on differnt devices (Windows 10 Desktop, XBOX One, Android Phone).

I think there is something in trouble after change the player id for the main player.