Every time i try to enter the nether my game crashes.

Basically i try to go to the nether, and my game just crashes.   I play on minecraft bedrock edition for the xbox one, on the beta 1.12.0.2 update, and i have a world i share with my family and friends. and i was on by myself, and tried to go into the nether, My game just froze, and then crashed a minute later.  (Also if i have done anything wrong, please tell me what i can do to help report bugs better. thank you.)