Game crashes when opening world after mapping terrain

After mapping new terrain with a map and quitting to menu the world size is extremely big. The world will noat load and crash the app. Only closing the app sith the taskmanager will make the world playable again (and the world size smaller). Some black dots remain around the dot indicating the player.

Reproduce: craft map, explore some new terrain, go to main menu, load world -> crash

Fix: completely close the app, load world -> some black dots around the player on the map appear