I queued up for my daily random dungeon and got put on a group for Normal Vaults of Madness and after killing the last boss and completing the dungeon (Status: 'Activity Completed'), the usual experience and Undaunted Supplies reward were not awarded. When I went to queue up for another random, it still shows that I can obtain the daily reward. So, it seems that although the activity was completed, it did not trigger the rewards to be given.
I run multiple dungeons per day, so I'm not upset about this not counting. However, I was wondering if this is a bug with Vaults. Anybody else have this issue with Vaults or running any other dungeons using the Random Dungeons queue?