I am currently running an NVIDIA RTX 4090 graphics card across three monitors, the current game resolution is set to Fullscreen - 3840x2160x32 which is the max resolution of my primary monitor however when the game boots up the game opens in windowed mode, and tries to extend to my other monitor / is way too big in resolution, the only fix I've found is to wait for the main menu to load and hit CTRL+ALT+Enter which knocks it back into Full Screen mode and I can play the game fine after that but if I ALT+Tab out it goes back into window mode and the issues presents itself again and sometimes the CTRL+ALT+Enter combo won't fix it and I have to restart the game and repeat the initial steps. I've noticed too that if I make any changes in the graphics settings menu (Like adjusting the brightness) while it's working properly that it breaks and sends it back to Windowed mode as well, at a resolution higher than my monitor supports.