I am working on an application that relies on low latency push notifications and my upgraded iOS 9 device seems to be receiving push notifications 10 minutes or even more behind the other iOS 8 development devices. Push notifications are being sent with Parse, which has proven reliable, any thoughts as to the cause?
iOS 9 Beta 3 - push notifications with extreme delay from Parse
Hi! As mentioned on the official documentation, IOS Push notifications are still a best effort service, the delays may not depend from your push notification provider, and may be inherited momentarily from Apple's system. We developed a service layer that returns a reliable feedback on each push notification's delivery status and we did not encounter differences in the daily latency between IOS versions, sorry!