My character Thimble finished the Celestial Tournament today, an hour or two ago, and when I tried to leave the instance, I got D/Cd. Tried to reconnect, and this was when the game was having a lot of connection/login problems.
Things are back to normal now, but when I logged in it’s reset my progress and I don’t have a “leave instance” option. My pets are all damaged, so I can’t re-play the tournament, either.
The only way out for me now is to hearth, and come back and re-play the tournament, which is pretty dumb. I tried to figure out how to report this in-game, but the menus and choices don’t cover this example.
I doubt you’ll give me credit for finishing the quest, but… well, I thought it was worth a try.