QSlider on the Mac shows groove when handle is at the ends

Open the attached UI file in designer on the Mac and preview. You will see that the slider grove is still visible when the handle is at the extreme end. This gives the user the impression they haven't moved the handle to the end. It is more evident when the circle handle is in use then the one sided handle. I have attached screen shots showing the various visual problems. Native Mac apps do not render the slider this way.

The groove for the slider should be brought in to not be visible when the slider handle is at the end.