Setting the QSlider tickPosition property does not work as expected: 

 - NoTicks behaves as expected

 - TicksAbove and TicksBelow produce ticks only on the bar, but none above and none below, the blue highlight is also missing

 - TicksBothSides produces tick on the bar and above. This also produces another know QSlider issue (Bug
QTBUG-98093 QSlider is broken in MacOS Monterey, Bug #3, the slider is drawn in two colors)

Please see the attached picture: on the top half you can see the sliders in Qt creator, below in the running application.

Please also note, that the preview in Qt Creator seems to be incorrect for TicksBelow and TicksBothSides.