Minecraft switch 1.12 crashing constantly

Everytime i play the game i can only play it for about 5 to 20 minutes before it crashes and im forced to close and try again only for it to crash again. Also the main menu load time takes a while before i can even choose a world that has a purchased resource packed in use. 

Edit: crashing still happens after update 1.12.1 making the game virtually unplayable