Tier 6+ Corrupted Nexus bug

I completed a Tier 6 corrupted nexus, Tier 6 map with 4+ prefixes on it or whatever and killed the corrupted beast at the end but nothing happened. Shouldn't Doryani have shown up and my goal would move on to Tier 7+ corrupted Nexus?

Same problem here! It's annoying cause make me think about to stop playing this game...