Not a bug with the persian units.
The Ghurid armies in question are Afghan culture, and they did not use the Persian graphics, as they should. They're also supposed to use the horse archer model, which wasn't defined for the default muslim graphics, so the game fell back to using the western light cavalry model. Both issues will be fixed next patch. Thanks for letting us know.
The Ghurid armies in question are Afghan culture, and they did not use the Persian graphics, as they should. They're also supposed to use the horse archer model, which wasn't defined for the default muslim graphics, so the game fell back to using the western light cavalry model. Both issues will be fixed next patch. Thanks for letting us know.