Updating to Firebase Android version 15.0.0, signs users out

Question

When Updating com.google.firebase and com.google.android.gms from 11.8.0 to 15.0.0, our signed-in users are getting signed out. On checking, we are able to confirm that FirebaseAuth.getInstance().getCurrentUser() returns null.

A few other things i was able to confirm:

1. This has been confirmed for Phone Auth and Email and Password Auth

2. If I:

   1. Sign in to app v1 with library versions v11.8.0
   2. Update to app v2 with library versions v15.0.0

   I see myself signed OUT (as mentioned above).

   3. Do not bother to sign in again in this v2
   4. Update to app v3 with library versions set back to v11.8.0

   I see myself signed in.

3. If I:

   1. Sign in to app v1 with library versions v15.0.0
   2. Update to app v2 with library versions set back to v11.8.0

   I see myself signed in.

   3. Now if i continue and, update to app v3 with library versions v15.0.0

   I still see myself signed in.

4. I was able to reproduce this issue also if i upgrade from v12.0.1 to v15.0.0
5. This is most likely an issue with the library itself (and not my code) since i was able to reproduce this issue using Firebase Android Auth Quickstart

Does anyone else face this? Is there something i am missing? Did i miss something relevant in the v15.0.0 Release Notes?

Answer 1

I reached out to firebase support and they were also able to reproduce the aforementioned faulty behaviour. Turns out this is a an issue in v15.0.0 library itself.

Kyle from Firebase Support [Apr 25, 2018]:

After discussing this more with our engineers, they told me that the fix will be rolled-out on the next release (next version) soon. I can't provide the exact timeline for this but you may keep an eye out on the release notes for future updates with Firebase Android SDK.

Update [May 7, 2018]

Updating my dependencies from v11.8.0 directly to updates to Firebase Android SDK released on May 2, 2018 resolve the aforementioned issue.