Shannon updated his mobile phone to Android Marshmallow and now his apps time out after a few minutes. Leo says that Marshmallow added a feature called Doze, which is supposed to help with battery life, and Shannon should go into the application manager settings and see if the permissions are set to allow backgrounding. It may be that they are being blocked to work in the background. For the apps that are stalliing, Leo suggests uninstalling them and then reinstalling them, paying close attention to the permissions it asks for.