While there may be a few different reasons for progress not saving, before reporting a bug it’s best to check some device settings. First, make sure that your Game Center and iCloud profiles are matching, and that you’re connected to the internet. If that’s still not working, try logging in and out of both Game Center and iCloud. Lastly, ensure that you have storage on your device and your iCloud, as the game will have a hard time saving properly if there’s no storage space on your device.
If none of these options work, please reach out to us!