Freepbx conference music on hold is not playing for Admin if Leader Wait is set to “Yes”

In my Freepbx conference, I set Leader wait to "Yes". When the admin join the conference after pressing admin pin, it says 'Thank you' and goes silent until other user join with user pin. I did set "Music On Hold" 'Yes" and also chose 'Music On Hold Class".

However, it works if the user join the conference before the admin, the user can hear the music_on_hold. Also, If I set 'No' to Leader Wait, the music_on_hold works for admin even though he is the first to join the conference.

My question is 'is it possible to play music_on_hold for admin while waiting for other user to join even the "Leader wait' set to "Yes" ? That will help admin to make sure he is still connected to the conference.

Thank advance