In Orgrimmar vision valley of spirits does not count as complete when you kill the boss. It has not been fixed since 2020. I found reddit post and bug report on the US forums and vaious other places and nothing has been done since.
This makes a few achievements completely impossible … can be please not get a fix for this ?
Edit: engage the boss if you can without hitting it solves it … but its still annoying as he just explodes sometimes regardless