In 4.23p6 the size of screen is bigger than screen then running in shipping (or anything outside editor). In PIE all is ok, in standalone all is ok. But in shipping, screen is bigger than monitor and can not switch to windowed mode either (in fact it is surely switching but the window is still bigger than screen). Easy to reproduce, on only have to create an empty project, add UMG with anything in corners and you’ll see the problem. (I searched the bug databased, did not found it).