[Robo]

Describe the issue: Inventory bug that 'deletes' an inventory slot and deletes the item inside.  This would frequently happen to me as my inventory is completely full, due to no storage, and I frequently need to decide on whether or not I drop an item.  Sometimes I decide not to drop an item, as I deem it important, where I then lose it anyway to the bug.

How to reproduce:
- Open your inventory
- Left click and hold an item
- Drag the item outside the inventory area
- Decide it isn't worth dropping and bring it back into the inventory area and let go
- Slot becomes bugged and deleted
- Regret

Any relevant media (images, gifs/video, etc): 
https://www.youtube.com/watch?v=puZvwBXWrtg
Missing Items:
- Firefly x22 (split into first and last clip)
- Oranges x2
- Alessa x1
- Poppylus x1
- Cylion x10

Edit: After rewatching the first clip, it seems that you don't even need to drag it out of the inventory, and it looks more like you drag it onto the same slot.