Affects Version/s: 1.16.4
Fix Version/s: None
Under the following conditions, a villager's trade button in the trading UI won't move items from the player's inventory to be sold:
- There are no open slots in the inventory.
- There is an item in the trade slot, but not enough to complete a trade.
- There are more of the same item in the inventory, but they are all full stacks.
In this scenario, clicking the button only results in a grunt sound.
I encounter this situation frequently while trading with a full inventory. The slot freed by the item being sold can be filled by the items bought, fulfilling the conditions.