When playing Witcher 3, the Asus ROG PG258Q 240 hz monitor begins flashing certain colour blocks and then freezes while the dialogue keeps going for a few seconds then closes out the game and goes to the windows screen. We updated the Nvdia drivers, windows drivers, and validated the game integrity files. This is still happening. We have a custom built PC, with a 1080ti graphics card. Is this a software or hardware issue do you know?