Yes. I am one of the players stuck on that quest.
My first attempt was at 14/15. I dropped and started again. Now at 11/15.
I cannot progress my character in Shadowlands. I am forced to play a different character.
But it is worse:
We no longer can submit an in game issue and get a personal fix. Such as auto advancement to the next quest or reset of hidden stuff and restart.
I simply have to wait, for this toon, until I see that the bug has been fixed in a week or two.
Very disappointed. As a long time WoW player I am bitterly disappointed. It has left a really sour taste in my mouth.
(Yes I am not dumb. This is NOT a respawn issue. Players I stand next to can “see” unopened cages. All cages appear open to me. I have tried logging out. I have tried patiently waiting and just farming mobs until a “respawn” occurs. To no avail. I know what I’m doing. Other characters did not have this problem)
Once upon a time, Blizzard had cheery customer service staff with whom you could chat in-game. Yeah, they had some formulaic responses at times and I’d have a laugh but they would always endeavour to solve any bugs, glitches or problems.
Sadly… that is “back in the day”.
Edit: Curious to know if anyone else has had this problem.