Inventory Pick and drop bug

What it suppose to do :

When I open my inventory and I left click on an item, it take it and when I want to drop it in a case, it goes to the case.

What it do in reality :

**When I Try to drop an item in my inventory, it doesn't drop in the Last case (Complete Right) of the First Line. When item goes to that case by automatism, I only can take it if I click on a specific place in the case (left bottom).

How to reproduct the Bug :

1. Open Inventory with "E".

2. Take a item and Go to the Last Case of the first line.

3. Try to Drop it.

 

1. Take many item to fill the first line of inventory (not the one we see without opening inventory) 
2. open inventory
3. try to take the item of the last case in the first line with a click everywhere in the case.
4. Try to take an item with a click in the case in the left bottom.