Hit lvl 70 on my Earthen (that was in WoD timeline), went to Org, then Thrall gave his breadcrumb to start the expansion. I use the Silithus teleport, and about 1 second after arriving, Thrall phases out and leaves only the pre-expansion trolls there. Tried relogging, teleporting back to Org (where Thrall immediately gives me the quest and teleport token again), but same issue when returning to Silithus. Game loads a different phase and I’m unable to proceed to the expansion.
I saw several others having the same issue at the same spot and I believe Chromie time is the cause of it, as the others there were also in different chromie times when they hit 70. We tried talking to Chromie but she does not offer to change the timeline, simply talking about the Radient Song and saying they could use my help.
Edit: Seemingly fixed by going to Valdrakken, then portaling back to Orgrimmar, then proceeding as normal. I assume this forced me into a compatible dragonflight chromie time.