Some Level 70+ characters cannot access black market auction house after going to Isle of Dorn. I parked my character at bmah for a while, took it to to dorn to level a bit. Before I left i opened the bmah and it worked. While in dorn i leveled once, had war mode on and then turned it off. When i returned to the bmah in Valdrakken, my character could not interact with Madam Goya. I went back to the capital in TWW to see if I could use the one there, but nope, I could not. This issue has happened to other characters, mostly horde. Not sure the cause, not sure the fix. I tested other characters on the same realm and they work.