I'm put in bug report for this but I'm not sure if I need a support ticket as well. As of last patch I'm fundamentally unable to join the dungeon finder solo except for random dungeons. Here is what happens:
When I join the dungeon finder for a specific dungeon, regardless of class - tank, dps, or healer, I'll end up waiting 15-20 minutes for the 'your dungeon is ready' notification to appear...however it doesn't appear. The sound for it happens and the notification for it appears in the notifications UI but it doesn't actually show on the screen.
The notification in the notification UI itself says that you have '00' seconds to accept or decline the dungeon with the usual check or x to click on. Clicking on the x or the check does nothing - you can spam click on them and nothing happens. If I wait for another 10 to 15 minutes, the notification will change to say 'waiting for 4 players' and stay that way forever.
When this happens, I cannot leave the queue, I cannot quit the group, I cannot accept or join the dungeon - I am forced to relog in order to get out of this broken queue. I've had this happen 3 or 4 times in a row after waiting 15-20 minutes for the queue.
This is happening on 80-90% of all of the dungeon finder requests that I put in for all of my characters. This started happening as of the last major patch.