Highmountain / Titanic Showdown Quest

Hello! I speak a little of english and spanish, if somebody answer this please write it in a way that I can translate with google! :)

This is the quest what I have the problem: https://ru.wowhead.com/quest=40311/titanic-showdown

The NPC Huln doesn't move, so i can't complete the mission.

He must move and I must help him to kill Видение Смертокрыла
I add a video of how supose to be the mission (im so sorry if external links dont alloud) https://www.youtube.com/watch?v=AxeM...ab_channel=Bue

Today 14/9/2021 i see this bug
This is the NPC https://ru.wowhead.com/outfit=251512...ntain#comments

Thank you all for this!