Entities of all kinds despawing randomly

My villagers will randomly disappear as well as farm animals. I haven't had any trouble with my dogs disappearing but so far that is the ONLY animal or entity unaffected. I play on Xbox One S. My village is really suffering and once I get like six villagers they start to disappear I fear my villagers will die out. The same goes for my farm animals I get more than four and they disappear sometimes leaving me with one left in the pen.