While doing the cartographer quest on Isle of Dorn my dungeon queue came up.
I accepted and completed the dungeon. When I left the dungeon instead of being on the island I was stuck in mid-air somewhere off the map of Hallowfall.
To get unstuck I joined a follower dungeon and then used my hearth to get out of the loop.
The unstuck character service was not clickable while I was stuck in the air.
I was able to recreate the issue again by starting the cartographer quest and then queueing for a follower dungeon.