Entire screen blinks once per second during all parts of game

From the moment I launch the game through the intros, menus, everything flashes white for a split second about once ever second or so. I download and install and played the game on 1/21/20 for the first time and it worked perfectly. I had a message mentioning the next time I started the game it would launch slower. The next day the game said optimizing shaders at launch and the blinking started. I tried switching back to DX11 in the game menu and no change. Current version 1.0.5 CL 2079527