Description:

If player obtains many unstackable items very quickly by either filling a chest with it and breaking it or using a give command, then picks up as many items as they can hold, shift clicks them into a chest or other storage block whilst standing over the items not picked up. Quickly shift clicking items into the chest but once the player stops, new items entering the now empty slot will occasionally not show. The slot is taken by the item but it looks empty even though it's not.

Steps to reproduce:

1. Fill a chest or two with unstackable items or use the give command

1b. Break the chest(if using)

2. Once inventory full open chest and shift click the one spot

3. If you try to put anything in that spot it won’t work

Observed results:

The spot appears empty yet it is occupied by that item

Expected results:

The texture of the item occupying the slot should be visible