I have a 1.14.3 village, that no longer produces baby villagers. There are currently 11 villagers: 3 farmers, 3 librarians, 2 weapon smiths, 2 armourers, and one fletcher. The villagers will no longer pick up food, so I assume their inventories are full. I've traded with them a lot; I currently have over a stack of emerald blocks. The village has 5 iron golems. There are 19 beds, so the villagers should be reproducing. But they don't, they don't give the love heart particles, and they don't reproduce. The village has a bell, and wandering traders show up all the time. But no babies. This is on a multiplayer world that has always been in 1.14.