Game freezes i lose things

Game has frozen 3 or 4 times now, each time i have to exit app or it closes itself and i return to home screen on xbox, when i get back on things are missing, ive lost 4 villagers, one enchanted bow, 2 skeleton horses. Villagers are in well lit area away from mob spawning locations. Skeleton horses lead is where they were but horse is gone. When i say lead is there i mean the rope is wrapped around a fence post but when i take it off it doesnt pop into item form it just dissapears. One time a bed turned into the size of slab( half block tall, 1x1) invisible but solid until i broke it and a bed popped in my inventory, this was after a freeze. Seed is -502643823