Studio Pro Full screen is not full screen, please adjust...

Hi,

Probably at least once a day I accidentally close a window that is not Studio Pro when I try to close Studio Pro. This is because the top bar of Studio Pro is not completely full screen when it should be. It is hard too see, but there is a small white area right from the close button. When I quickly go to the top right and close the screen, it closes the underlying window, like my browser. This is pretty frustrating.. Can this be corrected please? 

Mx Studio Pro with tiny gap:

My browser, Edge, without gap:

Both are in full screen mode.

PS: This is both on my 4K external screen as my Full HD laptop screen