Video window is blank on secondary monitor

Dorico, Windows (version 2004)
Issue: Moving video window to another screen makes it go black. This happens regardless of playback running or if the video is showing still frame.

Video clip of the issue: 2021-01-20_19-49-30

The secondary monitor in question is Wacom One tablet screen. Video used here was 24 fps FHD mp4, but I tried several other video files and the results were identical.

Is this a known issue? Being able to place the video on another screen seems quite crucial. (Forum search turned out empty.)

It’s not a known issue, no, and in general with two “regular” displays it works reliably. Is there something special about the Wacom One that makes it different from other external displays?