Note: This has been resolved with the release of ProntoForms for iOS 10.1.1.
Apple has released iOS 13. We have discovered several technical changes to push notifications in iOS 13 which have not been well-publicized by Apple, resulting in push notifications being temporarily unavailable if your mobile users update to iOS 13. This is affecting many apps using push notifications, and we are actively working to release an update to ProntoForms for iOS that will support the changes Apple made in iOS 13.
If your company depends heavily upon push notification use for your ProntoForms deployment, we advise not upgrading to iOS 13 until this has been resolved.
Push notifications will continue to work as normal on devices running iOS 11 and 12, and Android devices.