invisible window ?

[Anceane]

Is there a way to detect an invisible window that could possibly block some part of any panels on the right on the screen ?

There is always a rectangle that bloc the tooltip and the mouse hovering of an item or the selection (approximatively middle of the inventory). And this invisible rectangle is always at the same vertical place.

If i want to sell the item i need to select it by the extreme right of the panel, same for decon an item

So is there a tool or a scrit i could do to detect what it is ?

Thank you