I won a game by buying out the Provinces. The game never ended, but the log hung on "reshuffling the Black Market deck." I tried reconnecting and waiting, but it is stuck. Screen shot attached. Game number is 8426326.
Update: I finally resigned and the end of game summary showed this game as a loss for me. I could not get out of it any other way.
Thank you for reporting. There is indeed some Black Market bug that has to be located.
That also destroys loading to some extent: last decision point is on turn 4.