I've been testing on the desktop and the OSD notification is not coming neither from the sound indicator when I change the volume using the keyboard short-cuts.
A very quick test for this I did was to be sure that the indicator was not running on the system and use the keyboard short-cuts. I still get the notification, so we cannot control that case either from the indicator.
I would like to add a note to this bug.
I've been testing on the desktop and the OSD notification is not coming neither from the sound indicator when I change the volume using the keyboard short-cuts.
A very quick test for this I did was to be sure that the indicator was not running on the system and use the keyboard short-cuts. I still get the notification, so we cannot control that case either from the indicator.