Villager breeding and farms not working

So recently I started working on a massive iron farm build and yesterday i attempted to start a villiager breeding farm i have made dozens of these before all using the same popular videos on youtube. Example. Small 10×9 area fenced off with a villiager 5 blocks below in a room full of doors exposed to sunlight. Normally that model would work. It doesnt anymore. After afking over night the 3 villiagers I had moved to my breeder actually despawned. Even with names. I play on peaceful mode so no mobs. I was afkd right next to them. Also attempted to make a creative mode and try various other methods for villiager farms and none of my sample versions work as well. If anyone can tell me the issue I am having is it because of the recent update? Or a different problem I would greatly apprciate it.