[🐛] Bug Report Duplicate fcm push notification in react native android backgroundhandler

[Cazs03]

Related to https://stackoverflow.com/questions/71507734/duplicate-fcm-push-notification-in-react-native-android-backgroundhandler

I getting duplicate notification in background

"@react-native-firebase/app": "^14.9.4",
"@react-native-firebase/messaging": "^14.9.4",

JS React Native

    messaging().onMessage(async remoteMessage => {
      console.log('onMessage: ' + JSON.stringify(remoteMessage));
    });
    messaging().setBackgroundMessageHandler(async remoteMessage => {
      console.log(
        'Message handled in the background!',
        JSON.stringify(remoteMessage),
      );
    });

NodeJS banckend

messaging
    .send({
      notification: { title: 'Price drop', body: 'ioioioio' },
      topic: 'club'
    })
    .then((response) => {
      // Response is a message ID string.
      console.log('Successfully sent message:', response);
    })

Error:

[mikehardy]

Hi there! Please strip the code repro snippets down to just an index.js and App.js that do nothing but show exactly how you reproduce this problem.

Please note that if you include a notification block in the FCM you send, the firebase-android-sdk will display a notification. Period. Every time. Outside of your control. You will not be able to disable it.

So then if you also pop a notification using some other code that you are not showing, you'll get two.

Every time these have been investigated it has been a combination of that fact not being fully understand and then - with the new understanding - detecting API mis-use and altering project code.

It never results in changes in this library and is not actionable here - to set expectations

[Cazs03]

Hello, but I did not understand you with the answer. Do you want me to reduce the code to the most basic? Or expand information with more code?

[mikehardy]

Both, your example right now is not complete or I do not think there would be a second notification, and I suspect it is not minimal as when I see snippets that implies a lot more code elsewhere. Both complicate triage and should be avoided when requesting help: https://stackoverflow.com/help/mcve

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