Any issue using a top mount hanger for a joist on a double top plate. Seems stupid, but my profile of the joist has a notch in it to make a roof eave, so I dont want to bear on the cut.
I think it's fine, but I'd add blocking between the joists for the issues that lexpatrie mentioned. Also, this possibly isn't an option, but can you make the stud shorter so the joist bears on that? It's a slightly more solid connection (direct bearing joist to stud instead of hanger, less chance of splitting/checking at the notch) and you can still notch the end for the eave.
I think I'd be blocking between the joists above the top plates and providing some sort of lateral clip (A34 maybe?) to have a better force transfer from roof diaphragm to wall sheathing.
As far as hangers go, as long as your top plate thickness exceeds 1 1/2" in thickness you shouldn't have any reduction in strength (for Simpson at least).
You might look at simpsons details regarding firewall hangers. In a similar configuration.
They found some tendency for the top plate to roll as Lex mentioned.
This is under pretty particular loading with additional eccentricity due to the firewall part of it.
Their details and method of top plate reinforcement may aid your thinking about this.