Automatic sign-in does not keep the progression state up to date

[masonlouchart]

The elements expose the inProgress property to let you know if a sign-in/sign-up request is in progress. When the attribute auto is set to true, the element signs the user in automatically if its profile is already available locally. In this case the inProgress property is not updated.

[masonlouchart]

This "bug" is related to the fact that the polymerfire#firebase-auth element is using realtime by establishing subscription. It's easy to set the inProgress property to true before injecting the element but pretty difficult to turn it to false at the right time (that is at the first execution of the subscription callback).

IMHO, the only way to fix this issue is stopping to depend on PolymerFire and use the Firebase JS SDK.