when my boyfriend comes out of the end he dies

Whenever my boyfriend comes out of the end he dies from a high place but and his stuff doesn't come out of his inventory then he has to restart his Minecraft and it says that he needs to reinstall the game which he doesn't do and reopens it but all of his stuff is gone and I never see his stuff on the ground at all, he had a bunch of loot and we were both live when this is happening