I'm trying to run the game in full screen, 4k resolution (3840x2160). When I select 4k, it's like the game zooms in far too much to the point where menus etc are all scaled wrong, and I basically only see 1/4 of the game. There doesn't appear to be any way to get it to stop doing this short of hitting Alt+Enter and going back into Windowed mode, which looks like crap and runs in low resolution. I've tried other resolutions like 1080p and 1440p, all of which do the same thing as 4k, but to a lesser degree.
Is this a known issue?