DJI finally admitted and announced DJI GO app with compatibility issues on iOS 9. Unfortunately, there is no further details about what sort of "minor" compatibility issues so far.
I have not yet updated to IOS 9 but yesterday, flying my P3P with iPad Air, I experienced multiple in-flight disconnects from the aircraft (one as long as 11 seconds). I put it in return to home and when it got close to landing site (with several tall obstacles nearby) I attempted to cancel RTH so I could land manually. But I could not cancel RTH and the bird kept descending. I was able to override the decent with the stick while trying to steer to an unobstructed spot but it was a close call. Anyone experienced these multiple disconnects?