I’ve recently created a flat world  [With experimental gameplay on] and gave myself a limited amount of resources to live off of, mainly surviving off of renewable resources. I cured two zombie villagers and started a small village, and made sure it was well lit with a fence around it so they won’t die. I placed more beds and got a small village of about 5 villagers going. However they seem to keep despawning at complete random somehow. Once these villagers disappear, the remaining ones will not breed, no matter how much food I give them or trade with them. However once I place down even more beds, then they will breed. This leads me to believe the game thinks the same amount of villagers are there, even though some have despawned, as the villager to bed ratio is off and they refuse to breed unless I place more beds. (Update, found a forum with multiple people having the same issue. https://www.minecraftforum.net/forums/minecraft-java-edition/recent-updates-and-snapshots/2959174-villagers-disappearing-from-farms-bug-1-14 )