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Thank you for the report! Try using the option to wait at the servant's quarter after fast travel. Sometimes the fast travel option doesn't hop directly to the scene.
If that doesn't work, it's probably because someone else's route needs to be further along. 

If you have a chance, could you tell me what it says in the character logs for Isha? Those should be in your room. 

If anyone else needs help with this, what Mr. Rooster said about "someone else' route needs to be further along" was correct. Specifically, RHEA'S ROUTE was not far enough along. You must get to the point where Joy joins your camp in order to progress Isha's Route after this point.