I Have a basic villager farm for breeding set up. I have 4 brown coat villagers that do the breeding and one villager with the doors under them about 7 blocks deep (basic villager breeder) Before updating to 1.2.1 they would breed like crazy until they were out of food. Now they seemed to have stopped wanting to breed and stand in a group throwing food back and forth to one another endlessly.
No other doors are in the area and the baby villagers are moved over 100 blocks through a water channel away. I have broken the doors for the breeder and placed them back down and I have traded with them and thrown stacks of food at them till they cant pick up anymore. I went into creative to see if I could recreate the problem but they seem to breed with no issue. I'm at a loss as to why they all of a sudden don't want to breed. Just want to add that they were villagers that I removed from a village near by so they spawned with the world and weren't spawned using eggs. I play on hard survival and never been on creative.