The game freezes and crashes at a specific distance

Ok so in my survival, I have gone to the end before and came back, no problems at all, but then today I realised everytime I pass a specific distance, so far I think it is around  -1500 ~ 1500 and -1600 ~ 1700 no matter what, I cannot pass this, the game freezes with a white screen and just ends, no reason given, and it is only in this world, please fix it this world is a world I have been working on for a looooong time.