[firebase_messaging]: FirebaseMessaging.onMessageOpenedApp not working in iOS after upgrade to 15.2.2

[lukyanov]

Is there an existing issue for this?

• I have searched the existing issues.

Which plugins are affected?

Messaging

Which platforms are affected?

iOS

Description

@override
void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);
    FirebaseMessaging.onMessageOpenedApp.listen((RemoteMessage message) {
      logger.d("A new onMessageOpenedApp event was published!");
      // some useful logic here
    });
}

onMessageOpenedApp is not triggered when the app is opened from the "killed" state. It works when the app is in the background though.

The plugin version 15.1.6 (the previous version I used) works perfectly, as expected, in both cases.

iOS 18.3.1

Reproducing the issue

1. Close the app (swipe it away)
2. Send a notification via firebase console or with a script (in my case I have a link attached to the notification data)
3. Tap the notification

FirebaseMessaging.onMessageOpenedApp is not triggered.

Firebase Core version

3.11.0

Flutter Version

3.27.2

Relevant Log Output

Flutter dependencies

No response

Additional context and comments

No response

[SelaseKay]

Hi @lukyanov, the behaviour you're experiencing is intended. onMessageOpenedApp is only triggered when app is opened from a background state(not terminated) as indicated here.

[lukyanov]

@SelaseKay I'm sorry, I explain myself in a wrong way. I actually meant await FirebaseMessaging.instance.getInitialMessage() which is always empty in the newer version of the plugin. I'll rewrite the description.

[lukyanov]

#17107