Does a new account help it? I didnt try that I started a new world
Same problem on windows 10 but only crashes for the 2nd player on a multiplayer game, my fiance died in the nether and could get back into the realm but can't acces chests/inventory etc. if she does it crashes i exported the world to use on lan and the same happens, copied it to her pc and ran it I joined the world and crashed without loading the world :S
I havent had any issues since but haven't died much since!!! Hard to say