When moving the slider on the page display in the print dialog box, changing its value updates the preview image. This includes using keyboard left and right keys, clicking on it, dragging the slider, and the left and right buttons to the left and right of the slider.

Except, if it is selected and moved with the mousewheel, it does not update the preview. It does not also update the preview after a few seconds so I do not believe it is intended to specifically not update the preview in this case. Instead I believe this is a simple thing that was just overlooked.

The unexpected behavior is that I can scroll between the pages, but then I have to click on the slider (doing nothing except selecting it) and then the page is updated. The expected behavior is that changing the slider value updates the displayed page without having to select the slider again with the mouse or keyboard.

A picture is included that explains everything instantly. I believe this is not a complicated bug but it is a simple oversight. It may be related to Windows 11 and the mousewheel slider change event is different on native forms. It would also be easy to overlook in the ui test environment and could simply have been unnoticed by developers.