Odd placement of sliders in images of panels

I seem to be getting odd behavior taking snapshots of panels with sliders. The image below shows the issue. The slider ends up at the top left when it should be somewhere on the panel middle (left). I see this in other cases too, for example when I take a snapshot of an input panel, save it as a PICT, and place it on a layout as a reference log.

I am on macOS 10.14.6. I believe this odd behavior does not happen on Windows (although I have not confirmed this).

Igor Pro 8.x

slider in wrong position on panel

Sure enough, I can confirm this problem. Looks like a type of bug that I've run into before when drawing controls with Qt.

My bug stack lately is getting deeper, so it may take a few days to get this fixed. I've entered a bug ticket so I won't forget.