I try to continue the Yennay questline by talking to Queen Selvana but it's hardlocked into replaying the scene after you kill Morati's father, and I can't continue the quest. (I've already completed the Morati questline as far as it goes.)
It does look like doing Morati's questline before Yennay's is past the step to talk to Selvana does break that interaction permanently.
I might end up waiting for a bugfix for this (since it's my only save file, and I don't have the time anymore to restart from the beginning.)
