Not sure how to describe what's going on, but the video shows it. It's like the display windows are "cut off".
I'm on a Mac (10.14.5).
It showed up for me in 2019.26, but it persists back in previous versions now (2019.25, .24, etc).
I've tried deleting the perspectives (no change) and the keybindings (no change).
The Facebook group didn't have a solution, so I'm posting it to the wizards here.