We've seen reports of Flashing/Blinking Display issues with folks on high-end PCs (Nvidia RTX 4090). After testing, we've found a workaround/fix is to upgrade the bios on the 4090 video card. You will need to download the NVIDIA GPU UEFI Firmware Update tool, run it and then follow the onscreen directions. Once complete, you should be able to play without having the issue reoccur.