Summary:
The item taken from Allay moves to the empty slot (where the player takes the item) of the player, and not to others in the stack. This breaks parity with Java and makes getting items from Allay very inconvenient.

Steps to reproduce:

1. Summon allay.
2. Take 2 items (which can be placed in 1 slot).
3. Give 1 item to Allay.
4. Take item from Allay (with an empty hand).

Observed results:
The item is moved to an empty slot (with which the player takes the item from Allay).

Expected results:
The item is moved to an item that already exists in the player's inventory on the stack.