Is anyone else having problems with Game Center after upgrading to iOS 9? It works fine on my iPhone 5s, but on my iPad Air 2 the Game Center app displays a white screen and going to Settings -> Game Center freezes settings (displaying the previously selected setting page). Sometimes after a minute or two both will load, sometimes not. I managed to sign out, but that didn't help. Neither did resetting network or all settings. I'm currently restoring from a backup I made prior to upgrading to iOS 9. If that doesn't work, I'm going to try a restore.