Anyone having performance issues after updating to iOS 9?

I have a game that was running brilliantly at 60fps on iOS 8. After updating to iOS 9, I'm getting bizarre issues where seemingly out of nowhere, the fps will drop to ~20-30fps for a good while, then randomly go back to 60fps. This is completely random, and has nothing to do with my levels themselves. Again, everything was perfect in iOS 8.

Has anyone experienced anything like this? This is happening on three of my devices (iPhone 5S, iPhone 6, iPhone 6 Plus). I can confirm that using iOS...

Anyone having performance issues after updating to iOS 9?