🐛 [firebase_messaging ] Unreliable notification delivery on iOS

[praharshbhatt]

Bug report

Describe the bug
Notifications are not getting received on iOS reliably. Sometimes users receive the notifications, sometimes they don't. For the notifications with images, images never load.

I'm using:
firebase_messaging: ^7.0.0

I've double checked the Code. This same code works well on Android:

  //Register Firebase messaging
  _registerFCM() {
    //Register Firebase messaging
    _fcm.getToken().then((token) {
      strFCMToken = token;
      print("Firebase Token: " + strFCMToken);
    });

    if (Platform.isIOS) {
      iosSubscription = _fcm.onIosSettingsRegistered.listen((data) {
        // save the token  OR subscribe to a topic here
      });
      _fcm.requestNotificationPermissions(const IosNotificationSettings(sound: true, badge: true, alert: true));
    }

    _fcm.configure(
      onMessage: (Map<String, dynamic> message) async {
        print("onMessage: $message");
        showInAppNotificationDialog(message);
      },
      onLaunch: (Map<String, dynamic> message) async {
        print("onLaunch: $message");
        showInAppNotificationDialog(message);
      },
      onResume: (Map<String, dynamic> message) async {
        print("onResume: $message");
        final token = Preference.getString(PreferenceKey.TOKEN_KEY);
        if (token != null) {
          navigatorKey.currentState.popUntil((Route<dynamic> route) => route is PageRoute);
          navigatorKey.currentState.pushReplacementNamed("/home");

          showInAppNotificationDialog(message);
        }
      },
    );
}

We are also sure the notification permissions on iOS are requested for the users, and the same are accepted by all the non-receiving users.

Here are the screenshots of the campaign that failed the delivery:

---

Flutter doctor

Run flutter doctor and paste the output below:

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PASTE OUTPUT INSIDE HERE

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Flutter dependencies

Run flutter pub deps -- --style=compact and paste the output below:

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  ╔════════════════════════════════════════════════════════════════════════════╗
  ║ A new version of Flutter is available!                                     ║
  ║                                                                            ║
  ║ To update to the latest version, run "flutter upgrade".                    ║
  ╚════════════════════════════════════════════════════════════════════════════╝


Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 1.20.3, on Mac OS X 10.14.6 18G103, locale en-SG)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 30.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 11.0)
[✓] Android Studio (version 4.0)
[✓] VS Code (version 1.46.1)
[✓] Connected device (2 available)

• No issues found!

---

[darshankawar]

Hi @praharshbhatt,
Can you provide the iOS version on which you are seeing this behavior ?
Also check this issue for more reference.
Thanks.

[google-oss-bot]

Hey @praharshbhatt. We need more information to resolve this issue but there hasn't been an update in 7 weekdays. I'm marking the issue as stale and if there are no new updates in the next 7 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[ganeshAudetemi]

iOS 13 and 14 some notifications are delay

[google-oss-bot]

Hey @praharshbhatt. We need more information to resolve this issue but there hasn't been an update in 7 weekdays. I'm marking the issue as stale and if there are no new updates in the next 7 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[google-oss-bot]

Since there haven't been any recent updates here, I am going to close this issue.

@praharshbhatt if you're still experiencing this problem and want to continue the discussion just leave a comment here and we are happy to re-open this.