Did you manage to get the new Jinora scenes now?
I had a save right before her birthday, I invited everybody, gave her the ring, bought the decorations before the party, so basically the perfect birthday for her but the scene just doesn't trigger. Tenzin never falls asleep, Jinora wants to drink some alcohol from Shady but Katara objects and the only option left after the party is some siege or fuck/sauna scenes or straight going back to Republic City.
I got the bad feeling that I have to start the slave route from the beginning...
Edit: I gave up and downloaded the birthday save from 825. Now it finally triggers the Jinora route.