Please follow the below steps:
1. Check the game version. Please download the latest version of the game in Google Play.
2. Clear the game's data: Settings>Apps>See All Apps. In the game app go to: Storage & Cache>Storage>Clear Cache. It is not recommended for single-player games.
3. Upgrade to the latest software version, back up important data, and restore to factory settings.
If the issue persists, contact the Nothing Support Team for further assistance.