I haven't experienced your Siri issue, and this may or may not work, but try going to Settings > General > Siri, and turn her off, then back on. After that, change her gender to male, then change his gender back to female.
Again, this may or may not work; I'm trying to get her to "reset" for you.
Well, look on the bright side. At least the Siri lockscreen vulnerability is also gone from your phone… Just joking. I will keep my eyes open and if I see anything out there about Siri issues after 9.0.2, I will post it here.