Regression: Heavy Delay of Push Notifications on iOS 18.1 beta (10s and more)

App & System Services Notifications
Quappi OP
Created Sep ’24
Replies 19
Boosts 6
Views 2.7k
Participants 11

My app one sec uses push notifications to guide the user back to the app from a Screen Time Shield (screenshot attached).

On iOS 18.1, notifications are delivered with a delay of 10+ seconds, even though they are classified as time sensitive:

notificationContent.interruptionLevel = .timeSensitive
notificationContent.relevanceScore = 1.0

The notification trigger is nil, which according to the documentation should show the notification banner immediately:

var notificationTrigger: UNTimeIntervalNotificationTrigger? = nil

"The condition that causes the system to deliver the notification. Specify nil to deliver the notification right away."

In the sysdiagnose I have noticed that activity related to Apple Intelligence Priority classification delays the notification by 10 seconds ("UserNotificationsCore.IntelligenceActor"):

[create, [id=43C0-B333, time=2024-09-27 06:03:26, bundle=***.riedel.one-sec], Time elapsed=10.373 sec]: Timeout of 10.0 reached. Cancelling work.

[create, [id=43C0-B333, time=2024-09-27 06:03:26, bundle=***.riedel.one-sec], Time elapsed=10.377 sec]: Calling out to completion with failure(UserNotificationsCore.StepFailure.timedOut(exceeded: 10.0 seconds, summaryStatus: Optional(UserNotificationsServices.NotificationSummaryStatus.inferenceTimedOut), priorityStatus: Optional(UserNotificationsServices.NotificationPriorityStatus.inferenceTimedOut))) from 'scheduleTimeoutToPerform(after:for:)'

[create, [id=43C0-B333, time=2024-09-27 06:03:26, bundle=***.riedel.one-sec], Time elapsed=10.378 sec]: Step: UserNotificationsCore.IntelligenceActor, index: 0 exceeded 10.0 seconds

This seems like a bug to me, time sensitive notifications should be exempted from being analyzed for priority, especially if that comes at the cost of delaying notifications by 10 seconds.

Tracked in Radar: FB15255061

Replies  19
Boosts  6
Views  2.7k
Participants  11
Engineer OP
Apple
Sep ’24

Thank you for the Feedback report on this. The relevant teams will be investigating it. You can view the status of your feedback Feedback Assistant under Resolution. Here you can track if the report is still being investigated, has a potential identified fix, or has been resolved in another way.

For more details on Feedback Status, please see “Understanding Feedback Status” at https://developer.apple.com/bug-reporting/status.

1
Bxmakaveli51 OP
Oct ’24

Still experiencing this same issue on iOS 18.1 Beta 6. (16 Pro Max) only solution I have found is to disable Apple Intelligence.

1
Bxmakaveli51 OP
Oct ’24

Bug is still present for me on iOS 18.1 B7.

1
RickNY OP
Oct ’24

This delay still occurs in iOS 18.1 RC (22B82) on iPhone 16 Pro when Apple Intelligence is enabled. This is an unacceptable amount of delay for time sensitive notifications, for example - push notifications from the Duo MFA application do not appear until 10-12 seconds, and the time out to response is only 20-30 seconds. I filed my own feedback fro this under FB15418918, which reports "More than 10 similar reports". The only solution I've found is to completely disable Apple Intelligence.

2
Midnite630 OP
Oct ’24

First impression on 18.2 beta 1 it appears to be much better.

1
McNizzle OP
Oct ’24

Still present on official iOS 18.1 version when Apple Intelligence is on and message summaries is turned off

Turning off Apple Intelligence fixes the issue. Mainly notice this when using authenticator as others have mentioned

2
Quappi OP
Nov ’24

I am now on the iOS 18.2 beta. On my iPhone 15 Pro the issue came back. It’s not as bad as on iOS 18.1 but it’s very inconsistent. Sometimes it takes 5 seconds for the push notification to show up.

Before, push notifications would show up instantly. That’s also what the API is meant to do.

Super strange that Apple can’t get insane recession under control.

0
Island_Dev OP
Nov ’24

It's still an issue I have disabled Apple Intelligence

1
Midnite630 OP
Nov ’24

This is back again in 18.2 beta 2

1
ik8sqi OP
Nov ’24

On iOS18.1, leaving Apple Intelligence on, this fixed it for me (at least with the Okta Verify app). Settings - Notifications - Summarize Previews - Turn ON (I had turned it off after upgrading...)

And ensure your app(s) in the list underneath it has it enabled too (I left them all enabled).

0
rmahmud28 OP
Nov ’24

This bug still exists in iOS 18.2 beta 3. Why is such a critical issue not fixed yet? I have to wait several seconds for my 2FA notification to arrive for example.

And my iPad doesn't have this problem with AI enabled, why is my iPhone 16 Pro having this issue?

2
rmahmud28 OP
Nov ’24

It seems turning passcode lock off and on gets rid of the delay… can anyone here try doing this to see if the delay is gone? I will keep an eye on my phone to see if the delay happens again.

0
rmahmud28 OP
Nov ’24

Ignore my above comment, it seems having iPhone Mirroring enabled delays my notifications by 10 seconds even if I have my MacBook closed? When I turned off passcode it automatically unpaired iPhone Mirroring which was why my notifications arrived immediately. But when I paired my phone back to my Mac my notifications are now delayed again.

1
Pippymint OP
3w

Same issue on iPhone 15(standard, not pro or max) running 18.1.1 Heavily noticeable on 3rd party apps such as life 360 and security cameras.

1
Midnite630 OP
2w

Seem like it's fixed again in 18.2 RC release.

1
Regression: Heavy Delay of Push Notifications on iOS 18.1 beta (10s and more)
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