Villagers have 8 inventory slots, but they are only able to pick up 64 of a particular item at a time. So they can have 8 stacks in their inventory, but only 1 of those stacks can have potatoes, for example. This behavior does NOT occur in Java edition; however, it may be WAI in MCPE, but I don't know for sure so that's why this ticket exists.

Steps to reproduce:

1. Spawn a villager.
2. Throw 64 carrots at the villager. The villager will pick up all of the carrots.
3. Throw another carrot at the villager. The villager will NOT pick it up.
4. Throw bread, a potato, or beetroot at the villager. The villager WILL pick it up.