Having trouble with tabSelectedLeft/Middle/RightFrame on a Tab bar

Basically I don’t want to use a Highlight Overlay, I just want normal graphic and over graphic but can’t seem to get rid of it.

If I don’t have tabSelectedLeftFrame, RightFrame, MiddleFrame etc… in my code then the last frame of the sheet gets used as the Highlight Overlay.

So how can I disable Highlight Overlay ?

Any ideas ?

EDIT: As a fix I have picked a 1x1 pixel transparent bit on my sheet and used that as the highlight overlay.

Dave