I'm on survival peaceful mode, and all my horses, villagers, and iron golems always despawn after a day, even if they have nametags. I had all my horses encased in a large fence, named them, came back the next day, and they were all gone (I searched the area in creative mode, they weren't anywhere nearby). I also was visiting a villiage near my base for a few weeks, and I went there one day and there were only three left (out of about fifteen before). I surrounded the entire village with two-block high walls, spawned in about eight more villagers (I tried to breed them; it wouldn't work) and an iron golem, named all of them, and I came back today, and now there's only one villager left, and the iron golem is gone. Does anyone know how to fix this?