Why does firebase push_token return Blacklisted?

Question

I am implementing Firebase messaging in my app.

While I am testing the app sends the refreshed_token to my database, but in live production environment (Play store)

Answer 1

from Firebase support:

Hi there,

It seems that this is a known minor issue with our internal infrastructure where the device used for the Play Store review can be BLACKLISTED by GCM / FCM in some occasions. However, this should not affect your real users. We are looking beyond Firebase and working with Play Store team to avoid this inconvenience.