Farmer villager can pick up items, even if his inventory is full

a farmer villager tries to pick up a crop, even if his inventory is full and objects remain invisible on the ground.
If you give him 64 wheat, he will make bread and this bread and the rest of the wheat will fall out of it.

how to reproduce
spawn villager ---> fill his inventory with seeds ---> give him wheat and seeds ---> he will give you bread and wheat, the seeds will become invisible