Once I minimize back out to windows, and I get back into the game, I get a blank screen. Does anybody else have the same problem?

Had this happen to me using ALT TAB at one point. Used Alt tab to get back into game and sat staring at a black screen. Fixed by mouse clicking on the game icon in the windows task bar. Maybe will work for you? GL

Similar experience. When I tabbed out and went to tab back in, it had a black screen with a white lined border. Clicked on icon, then clicked on screen and it seemed to come up. Funky.