The Torghast campaign skip was only removing the gating from some of the quests, but not all of them.
It hasn’t been specified anywhere what waiting has been removed, but my understanding is that it’s simply the waiting between finding the clues and actually going in to rescue them.
Rescuing one character and jumping immediately to the next I believe still has the wait. There was some discussion in a thread here in Customer Support (now that I see this one moved) recently, and there are several threads coming up in a search in General Discussion you could add your voice to.
https://us.forums.blizzard.com/en/wow/t/cant-unlock-twisting-corridors/815276