What I expected to happen was...:
The new villagers would become farmers and then they would farm the crops.
What actually happened was...:
The new farmers will walk around like they do not have an occupation.
Steps to Reproduce:
1. Find or create a village
2. breed the villagers
3. ensure that the new villagers become farmers
4. wait
do you have mob grieving set to false? then any mob can't break, place or pick up blocks (except for end crystals)