[🐛] setBackgroundMessageHandler does not work on IOS > 17 and react native 72.2 about react-native-firebase HOT 4 OPEN

If you include a notification block and a data block it is considered a "mixed" content message

the message will not trigger a background handler ever as it will instead (at the deeper firebase-ios-sdk layer) trigger a user-visible notification (but not start your app! no handlers called!).

If the user interacts with the message it will open your app and trigger onNotificationOpened with message contents that include the data block

I believe our documentation here may not be accurate and it conflicts slightly with upstream 🤔 - it would require some testing to see. The difficulty with testing is that there are a lot of conditions to meet in order for the test to be accurate

• setBackgroundHandler needs to be passed an async function that does no UI updates and returns a Promise
• the JSON needs to be perfect with priorities etc
• the device needs to have background refresh enabled and otherwise deliver the message - verified by watching device logs while plugged into developer machine via Xcode console on running app or Console.log

Upstream docs state this, which makes me think the behavior you observe is by design:

https://firebase.google.com/docs/cloud-messaging/concept-options#notification-messages-with-optional-data-payload

When in the background, apps receive the notification payload in the notification tray, and only handle the data payload when the user taps on the notification.

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Hi, could you solve the problem? @alexstock1

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Hello 👋, to help manage issues we automatically close stale issues.

This issue has been automatically marked as stale because it has not had activity for quite some time.Has this issue been fixed, or does it still require attention?

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I am also facing this issue.

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