hidden Inventoy

I encounter a new difficulty:
I have an inventory that is supposed to open when I press a small button at the top of the screen.

But (it worked well until now) he does not want to leave !!

Here is my setting :

I don't understand...

The interface shows up yes? You are having difficulty getting the interface to hide?

Quick note: the action on leaving thing is only called if the mouse leaves the interface area. For it to work you need to specify the interface area. It's the second button from the left on the toolbar above the interface preview form.

Oh thanks !!
There was a dummy selection inside.