This has been happening for a long time with my villagers from my in construction Iron Farm, in my villager breeder they breed fine but when I try to breed them in the iron farm (in a capsule) they pick up the food and keep it. The last time they bred it was weeks ago and only has one child. I have 20 beds and 6 villagers. they are in capsules 2 in each.

(Only have a texture pack)

Reproduction:

1. Make a capsule like this https://www.youtube.com/watch?v=Fn7b7wN_NOc (6.16-7.36)
2. destroy the walls for 2 villagers to form a 2x2x1 capsule
3. Place villagers and food and then immediately place the glass on top of them

Expected Results: They should breed

Observed Results:They do nothing