iOS: Token refresh issue with Firebase services after 1 hour

[TakuroNagasawa]

Overview

When using Flutter with Firebase on iOS, all Firebase services become unavailable after approximately 1 hour of login. This appears to be related to token refresh handling.

Environment

• Flutter version: 3.27.3
• Dart SDK: >=3.6.0 <4.0.0
• Platform: iOS
• Firebase packages:
  • firebase_core: ^3.10.1
  • firebase_auth: ^5.4.1
  • cloud_firestore: ^5.6.2
  • cloud_functions: ^5.3.1
  • firebase_analytics: ^11.4.1
  • firebase_crashlytics: ^4.3.1
  • firebase_messaging: ^15.2.1

Problem Description

After approximately 1 hour of usage:

1. All Firebase services stop working
2. Various PlatformException errors are thrown
3. App requires force quit and re-login to restore functionality

Error Messages

PlatformException(unavailable, The service is currently unavailable...)
PlatformException(unknown, Unknown error or an error from a different error domain...)
PlatformException(internal-error, An internal error has occurred...)

Related Issues

• iOS: Token refresh issue with Firebase services after 1 hour flutter/flutter#162340
• iOS: All Firebase services become unavailable after 1 hour of login #17024
• https://github.com/firebase/firebase-ios-sdk/issues/14389

Questions

1. Is anyone else experiencing similar token refresh issues on iOS?
2. Are there any known workarounds or solutions?
3. Could this be related to how background tasks are handled?
4. Are there specific configurations needed for proper token refresh?

Any insights or experiences would be greatly appreciated!