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Extremely high number of 404 returned by Chrome subscriptions (FCM endpoints)
Starting from Jun 26 we noticed a very high number of Chrome subscriptions (https://fcm.googleapis.com/fcm/send/...
) returning 404 errors. All these subscriptions were returning successful status codes in the previous days / months.
This gem then raises InvalidSubscription
when a 404 is returned by the endpoint.
This seems like a serious issue in FCM...
I am opening this topic here in case someone is experiencing the same problem or has additional information to share.