Drawing glitch on tab delete

[LittleBiG]

Set the "Show x close buttons on tabs" to "All tabs on hover". Create a couple of tabs, with different width. Locate one which has a shorter tab on the right side, and delete it (the longer one). The shorter tab jumps to the place of the deleted one, and an unnecessary close button appears on it.

Edit: short gif added.

[admin]

Confirmed. Fix coming.