Hi, I am also having these same issues as you guys are with the controller just not responding to any additional inputs at given times, and today fell off the platform in titan extreme because of it. I also have Windows 8. (not 8.1 though)

My character would not stop running in a given direction, and I had not ever hit Autorun/LB (I knew better since the Autorun became so sensitive recently) so it was not that. This doesn't happen in any other game I have tried with controller (MGR:R, PSO2, and Dark Souls, for example) so I can't blame the controller here.

Please fix this.