Although I subscribed to the "topic message", iOS was able to receive it, and Android was not able to receive it

  android, firebase, firebase-cloud-messaging, ios

Although I subscribed to the "topic message", iOS was able to receive it, and Android was not able to receive it.

I coded according to the guide, and when I sent a message from the console, I sent a message to the subject.

While still not receiving reception, I waited for the next day to come after seeing the tool tip that there could be a delay of up to a day for new topics.

After about 28 hours, I retested it and found that the Android device did not receive the message, and the iOS device was able to receive the message.

That’s why I don’t know what the problem is, and I want to get the experience and advice of the person who has used the function.

Source: Android Questions

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