Full screen apps not covering full screen (Windows 11)?

I have this odd problem that I thought was specific to apps but seems to affect several: when I try to make an app full screen, there’s a line of pixels on the right edge that isn’t covered up. So if I have a white web page open in a maximized window, and then open a full screen app on top of that (Q10 for example), a line of white pixels shows on the right side of my screen at the edge of the full screen app. Seems to happen at multiple display scaling settings (at least both 125% and 150%) with the latest gfx drivers. I’m on the 11th gen i5 mainboard, FWIW.