For 'going to black' do you just mean the fog of war, and the map / mini-map? If you just keep exploring, it should start re-clearing again in blocks as you move.
If you double click on a character portrait to re-centre the screen focus there, does that help with the mini-map?
You can try exiting the BF and returning, though it would be a bit of a pain if you had to keep doing that...
