Component under mouse not updated if mouse cursor moved programmatically.
Issue: If unbounded movement is enabled for the Slider, at the end of the drag, the mouse cursor position is restored to the thumb position of the slider. However, since the mouse cursor is programmatically moved, the slider is not considered to be under the mouse and isMouseOverOrDragging returns false. This can cause glitches in drawing until the mouse is jiggled.
Thank you for reporting this and for the excellent repro as well.
I’ve attached a patch that addresses the issue and I hope to merge a fix soon. If in the meantime you could check if this patch also fixes the glitches with the Slider, it would be very much appreciated.