Restart your device: Memory issues on your device can cause a game freeze/crash. The best way to fix these issues is to restart your device, which clears the memory (this will not cause any loss of data).

Reset the game: Force close the app and reopen.

Update game software: Check the app/play store for updates to the game. Out of date software can lead to performance issues, including freezing.

Update device software: Finally, you should always ensure that your device has the latest software.