So if I push "9", full map opens for a second and then reverts back to escape menu, I can push full map from within escape menu and it opens for a second, jumps back to escape menu and then closes escape menu. I can see the full map for a second, so its there and working, just wont stay up long enough to do anything with. Any ideas?
I would look at your keyboard... if it's escaping back several steps it sounds like something's triggering that and that's likely to be "outside of the game". Played this morning with no map issues, but it does sound like something on your machine