Play Games Services Achievements Disappearing

Question

Play Game achievements unlocked in app don't persist after clearing the Play Games Services cache and restarting the app. When I test and successfully unlock achievements, but these are not reflected when clearing the cache and relaunching (or relaunching after sometimes).

I've used games_services package & the code for unlocking achievement is

GamesServices.unlock(
        achievement: Achievement(
          androidID: '####',
          percentComplete: 100.0,
        ),
      );

I've also submitted score to the Leaderboard

GamesServices.submitScore(
      score: Score(
        androidLeaderboardID: '###',
        value: score,
      ),
    );

Details:

• Play Games Services integration confirmed successful.
• User count displays correctly in the Play Console.
• Achievements are properly configured and enabled in the Google Play Console.
• Users sign in successfully before unlocking achievements.
• Detailed logging implemented, showing successful unlocking events and API calls.
• No relevant error reports in the Google Play Console.
• Achievement unlocking logic thoroughly reviewed and verified.
• Tested on multiple devices, Android versions, and Play Games accounts.
• Latest Play Games Services SDK version used.
• Official documentation and troubleshooting guides reviewed.
• Community forums consulted but no similar issues found.

Additional Information:

• App Name: Ludo Master (In case if you want to Test)
• implementation "com.google.android.gms:play-services-games-v2:+"
• Play Games Services SDK Version: 4.0.0