General help

Hi,
I have installed the official Moodle Mobile from play store and I can access to the course web site. That means the administration setting for mobile is enabled on the main site. I also, have enabled the following notifications as can be seen in the attached picture.

As I send a message to the news forum, I receive the email notification (on the web browser) and I can see the message in the message menu of the mobile app. However, I don't get any notification, e.g. play sound.

So, should I set more options for that? please let me know.