We are using Live Activities in our iOS app to show real-time flight information on the Lock Screen and Dynamic Island. Our implementation currently works as follows: The Live Activity is created using the push-to-start token. After the Live Activity is started, our backend receives and uses the Live Activity update token to send updates to the Live Activity through APNs. The Live Activity content is updated through push notifications from our backend. These updates include flight status changes such as check-in status, boarding status, gate changes, delay updates, arrival status, and other journey-related states. We are observing an issue where some Live Activity state updates are not reflected on the device. From our backend logs, the APNs request is successfully sent, but in some cases the update does not appear to be received by the device, and the Live Activity remains in an older state. We understand from Apple documentation and platform behavior that Live Activity push updates may be subject to system-level throttling or delivery limitations. We would like to confirm the expected behavior and understand the recommended approach. Could you please help clarify the following? Are Live Activity update pushes subject to throttling by iOS/APNs even when the backend sends the update successfully? If APNs accepts the request successfully, is there still a possibility that the update may not be delivered to the device or may not update the Live Activity because of system-level throttling, device state, power conditions, network conditions, or Live Activity limits?