Understandable. I tried playing it and it would launch, then minimize. Any time I try to open the minimized game, it would be a fullscreen black screen until it minimized again a few seconds later.
Strange problem, I'm not sure what you could do to fix it. Unreal can be really touchy at times. Have any youtubers (preferably silent ones) played this game?
I will try this on my other pc when I get a chance