In a survival world, I wanted to expand a village and get more villagers. I build way more houses than the number of villagers (to be sure they have at least a bed) and placed their standing block (loom, cauldron, ...), I breed the villagers and gave them a name to recognise them, but after some time, some of them disappear (and there were nothing to kill them, not even zombies, I had a lot of golems). I started at 15 villagers, and now I have 10 of them . I was wondering where does this come from, because I'm getting bored to breed them all the time.