As a group: I Queue as a Tank (yes I am really a tank), wife Queues as a DPS. Endless loop of "Your Dungeon is Ready", followed by a "Forming Group", followed by a "Someone Declined the Ready Check".
Tried rebooting Xbox, logging off/on, disbanding group, changing from Normal to Vet back to Normal, Queuing as different roles, Queuing as all 3 roles, removing all our armor and weapons, dancing like Dark Elves, yelling at the Xbox, etc.
I got about 5 crown repair kits yesterday so that's pretty sweet but this is not.
FYI zero problems if we Queue separately from each other.