I'm having a similar problem, the world I was playing in would act weird and then suddenly crash but once I reloaded it, it worked ok. But recently I decided to save & quit cause it seemed like it was going to crash again and thought maybe if I just save and reload it then it will work ok again, nope bad idea on my part apperently cause now the game crashes everytime I load the world, this is really frustrating because I really was enjoying that world and now it seems it's all lost cause unlike the PC version on the Switch you can't freely edit or restore files. So I'd say my world I worked so hard on is gone for good most likely unless they release a update that will fix corrupted world's for the switch.
I'm having a similar problem, the world I was playing in would act weird and then suddenly crash but once I reloaded it, it worked ok. But recently I decided to save & quit cause it seemed like it was going to crash again and thought maybe if I just save and reload it then it will work ok again, nope bad idea on my part apperently cause now the game crashes everytime I load the world, this is really frustrating because I really was enjoying that world and now it seems it's all lost cause unlike the PC version on the Switch you can't freely edit or restore files. So I'd say my world I worked so hard on is gone for good most likely unless they release a update that will fix corrupted world's for the switch.