I have been using Credential Manager for several months, but recently in March the sign-in in my application stopped working. The app freezes and it becomes impossible to complete the sign-in process.

Environment:

• Android 16

• Samsung Galaxy S25 Edge

• Kotlin

• Jetpack Compose

• Firebase Authentication

• Credential Manager API

• Google Play Services 26.18.33

Package name:

com.nordisapps.nordisradiojournal

I start sign-in using:

val googleIdOption = GetGoogleIdOption.Builder()
    .setFilterByAuthorizedAccounts(false)
    .setServerClientId(BuildConfig.GOOGLE_CLIENT_ID)
    .setNonce(generateSecureRandomNonce())
    .build()

The request starts correctly, but then Google Play Services throws:

java.lang.SecurityException: Unknown calling package name 'com.google.android.gms'

and:

ConnectionResult{statusCode=DEVELOPER_ERROR, resolution=null, message=null}

Then Credential Manager returns:

androidx.credentials.exceptions.NoCredentialException: No credentials available

Relevant logcat:

GoogleApiManager  Failed to get service from broker.
java.lang.SecurityException: Unknown calling package name 'com.google.android.gms'

Things I already checked:

• SHA-1 added to Firebase

• SHA-256 added to Firebase

• Downloaded latest google-services.json

• Google Sign-In provider enabled in Firebase

• Using WEB client ID (not Android client ID)

• Added:

  
  <queries>
      <package android:name="com.google.android.gms" />
  </queries>
  

• implementation("com.google.android.gms:play-services-base")
  

• Tried deleting Firebase Authentication user

• Tried .setFilterByAuthorizedAccounts(false)

The issue still persists.

Is this a known Android 16 / Credential Manager / Google Play Services issue, or am I missing some required configuration?