When playing 3 people together in split-screen, the 4th empty window in the bottom right corner is bugged out, causing constant visual glitches.
Any UI window that is opened, that covers any part of the 4th window, will continue to remain there after being closed down. Going into the Main Menu will remove any glitch, but problem comes back as soon as another UI box is opened.
Problem has been persistent for about 2-3 months.