little black gap above taskbar causing bottom of image to jump

[Rory31079484wpyt]

Windows 11

HP laptop

This is occurring in both photoshop and substance painter.
I recently got a new laptop and reinstalled my adobe apps.

I have noticed a small black gap that appears and disappears just above the taskbar.
It disappears when the mouse is moved or scrolled, and reappears as soon as the mouse is still.
Its appearence cause the bottom fifth of the application window to jump up a few pixels. 
There is an apparent squashing effect where the risen portion of the image meets the rest of the image, which remains still. 

This is a small annoyance, but it becomes difficult to focus properly when the image I'm working on is constantly contracting and expanding subtly. It's almost sort of nauseating in a way.

Does anyone have any idea what laptop or adobe setting would be causing this?

I have reinstalled my nvidia drivers but issue persists. thank you

[Rory31079484wpyt]

for reference, the gap in substance painter:

[Rory31079484wpyt]

and in photoshop, where it appears here at the bottom of the image rather than above the taskbar:

[Trevor.Dennis]

My first thought is GPU video card glitch.  Are you using the nvidia Studio or Game Ready driver?  Photoshop tends to work best with the Studio driver.

Second thought is could it be a zoom ratio vs display resolution glitch.  It is right on the cusp of displaying the screen on one or the other virtical line positions, and is jumping between them.  I can't image systems having that sort of issue for a very long time, but something is causing it.

Or is the Taskbar having diversity issues, and can't decide whether to be on or off, or maybe identify as a cat.  I still blame Donald Trump.