Twice in a row, Crusader, purge heresy, small, kill the last enemy (dreadnought) then press ok to leave mission results in dumped back at bridge, with character hopping around, then a disconnect from server.
No XP, rewards or items picked up remain.
If you remain on bridge, you get a blank character screen, press play, you enter a black bridge. Have to exit game and reenter to get back connection.
On a sidenote, even the small maps take me about 30 minutes, any chance of lighter maps for us who can sacrifice small amounts of time, but still make progress?