Ricardo a newer build 3702 (version 2.0.1) is now available in the app store. You can try updating to see if it fixes it. However, I would still recommend Exporting your progress as a backup.

Ricardo could you please tell us the version/build you are using (at the bottom of the More page)? Also, have you try uninstalling and reinstalling the app (need to Export then Import your progress). This will help us understand the issue you are experiencing. Thanks!