Can't drop items from inventory by tapping on avatar.

Whenever a item/item stack is/are been selected from the hotbar/inventory keeping the inventory open and then if the player's avatar it tapped, it doesn't drops the item/item stack.

Steps to reproduce:

1) Get an item in the inventory.
2) Open the inventory.
3) Select the item.
4) Tap on the character in the inventory.
5) The item should drop but it doesn't drops.