Live Activity Push updates throttling with frequent updates

We are updating a Live Activity via push notifications quite frequently. As the documentation suggests, we are using NSSupportsLiveActivitiesFrequentUpdates for this case. We are sending all updates with apns-priority: 10.

Is it still possible that iOS throttles push-updates with this setting enabled? For example we sent updates to APNS in this frequence:

2023-06-09T09:21:22.492224Z
2023-06-09T09:22:03.415876Z
2023-06-09T09:22:05.643268Z
2023-06-09T09:22:08.567353Z
2023-06-09T09:22:11.988442Z
2023-06-09T09:22:17.983494Z
2023-06-09T09:22:28.400757Z
2023-06-09T09:22:44.185622Z
2023-06-09T09:23:06.633058Z
2023-06-09T09:23:23.560052Z
2023-06-09T09:23:31.863625Z
2023-06-09T09:23:37.18351Z 
2023-06-09T09:23:44.086319Z
2023-06-09T09:23:49.40655Z 
2023-06-09T09:24:08.034848Z
2023-06-09T09:24:18.614194Z
2023-06-09T09:24:20.176428Z
2023-06-09T09:24:25.384654Z
2023-06-09T09:25:03.103147Z
2023-06-09T09:25:15.433726Z
2023-06-09T09:25:21.171693Z
2023-06-09T09:25:23.262028Z
2023-06-09T09:25:28.241116Z
2023-06-09T09:25:30.19816Z 
2023-06-09T09:25:32.440543Z
2023-06-09T09:25:42.381815Z
2023-06-09T09:25:50.581656Z
2023-06-09T09:25:55.659846Z
2023-06-09T09:26:15.042667Z
2023-06-09T09:26:26.924626Z
2023-06-09T09:26:28.608762Z
2023-06-09T09:26:32.012874Z
2023-06-09T09:26:39.111211Z
2023-06-09T09:26:40.415326Z
2023-06-09T09:26:51.142985Z
2023-06-09T09:26:54.364073Z
2023-06-09T09:27:04.225692Z
2023-06-09T09:27:30.80347Z 
2023-06-09T09:27:33.560981Z
2023-06-09T09:27:42.334313Z
2023-06-09T09:27:43.834646Z

All of those were sent successfully, but at some point the activity stopped updating. The activity continued for several hours after, but was never updated again.

What I checked so far:

  • From device logs we can see that there was no updated push-token
  • The sent content-state is correct

From these observations and considering the high-frequent updates, I suspect that there is still some throttling happening here.

Can anyone elaborate on this?

Thanks in advance.

Replies

I will comment on this, not with any solution but hopefully it helps.

There is an APNS "budget" that they talk about in this doc: https://developer.apple.com/documentation/activitykit/updating-live-activities-with-activitykit-push-notifications#

There is quite a bit of information which we have utilized with limited success (because it is so difficult to test).

Primarily using more priority 5 pushes, and setting the frequent live activity updates flag in my Info.plist.

Good luck and let me know what works for you!