Hi there,
I tried the CM dungeon (for lvl 40) in Queensdale in Story Mode yesterday. We killed all the enemies but at last point to reach the Queen the counter stopped at 2/3 killed. So we couldnt finish CM in story mode.
Members of my guild told me that this was going on in the exact same way days before. So Arena Net has to fix this bug – dont know it before and it wasnt that fun to finish the dungeon and didnt finish really.