Hi guys,
After migrating from the old plugin to the new FCM-based plugin, i notice this problem.
When a user updates the app from an old version (which was build using old GCM plugin), to the new updated app (build using new FCM based plugin), the new token-id received (usually after a few app restarts) is invalid and failure reported from FCM.
The old token id (from the older app version) is still valid and works.
But if the user does a new install of the app, then the FCM token-id received is valid.
Tested this on 2 different apps and it showed the same behavior.
Sample of old id : APA91bEa9gcHxFULN2fkBXA3-GtHIYJBI69pa2n9Frdrbzh9vs1bsc8IH4GOFyNgzdWkUbRJvkQlxE0JeebgTtsy52-WzXtNETsdxL1a8OZjnWrA6HoHboQhxQY4mW5pzraKlTZOWLOraY30NLG2pUfD-ZSFirtPug Sample of new id, invalid (FCM) : daBXcevPBxk:APA91bFNgPNbbuXtbK6XP0mz6OMi6gUphe59WyzqeIVEnPIUd5ClwqjhpJu57C2ddvf6zJbnb3UKVwooofDrSZtIoF-7CgH\_kA4DKibViYeREfOGRTXdE3ICaSgxMV2112\_DyYqF\_SrT Sample of new id, valid (FCM) : d1vUBQwKtNs:APA91bFGK6z2M3uioltedZvXjVTELwxrAyZN7nx1whloQLDn4xUPnQsxaootJF4YL8Mt3MgFF2i4C6nx-OlOetfJtNlR3RPfS8fBaSN23mZert4--abDzhoKFFI7epezlBoidt1QJWjn