Trying to re-enter the main area from any side area (e.g. leaving the kobold’s tunnels in quest “Seal the Tunnel” to come back to Durotar; leaving Theramore in quest “Escape Theramore” to come back to the Barrens) will simply block the game. As you exit the side area, you get the loading screen for the main area, press a key to continue, the main area comes on screen, and nothing happens. The UI doesn’t even appear anymore. Can’t even press F10. Only thing you can do is ALT + F4.
I have uninstalled and reinstalled the game, updated graphic drivers, tried starting from a fresh file, yada yada, nothing works. EDIT: also tried switching graphics to both Classic and Reforged.
Forum won’t allow links but I have a video of the bug if that helps.