I think there is some sort of problem with MacOS 10.15.3. I am frequently finding my windows going slightly off-screen. Sometimes half the menu bar is missing until I move my curser to top of the screen. Same issue with the bottom of a window being below the screen. Anyone else seeing this?
I see the issue in Accordance, Safari, and other applications. Not running in full-screen mode, but where the window fills the screen from menu bar to the bottom. The sides of the window also sometimes go off screen.