I have resorted to using generic Firebase blocks against a global component variable, to avoid turmoil in my blocks as I chase after new components for a token.
Is AI2 removing the tokens to throttle freeloaders?
I can confirm this behaviour. I setup a project with FirebaseDB1 and FirebaseDB2. On closing, both had the token. On opening this morning, FDB2 had a token, but FDB1 did not.