Ghost item can be created using the new inventory function

The bug

Having a full inventory and trying to pick up an item while holding F causes the item to visually disappear. Reopening the inventory and clicking on the item causes it to reappear, however the item can be permanently deleted if you log off at the right time.

How to reproduce

1. Have a full inventory (Including off-hand slot) and one item on the ground
2. Drop one item
3. Hold the F key down over the now empty slot
4. Repeat steps 2-3 until the item disappears

Example

Here is an example in video: Ghost Item.mp4