Unable to complete "The Warchief Cometh" quest.

After waiting for the warchief to appear, he appeared and said all his lines. The problem could have something to do with Sylvanas not actually being in the area or something. Please let me know if I've posted this in the wrong thread or should open a ticket for this issue.

If anymore info is needed please lmk.

Thanks,

Hyperlisk

you can check for "The Warchief Cometh" on bugtracker (by using search box): https://www.warmane.com/bugtracker

You can see there is a report flagged as "confirmed" (aka = it is bugged)
So, just skip it