stretch/KDE: system notifications at 100% volume
I'm on stretch, and use KDE plasma desktop. Whenever I get a notification, the
Built-in Audio Analog Stereo volume jumps to 100%, irrespective of the volume
level I previously set (e.g. 50%). This means that the notification sound is
louder than I'd like. Besides, also all other later sounds are too loud. As a
consequence, I need to lower again the volume manually, but at the next
notification I have the same issue. If the Built-in Audio Analog Stereo output
is muted, it stays muted even when notifications occur, but obviously this is
just a workaound to avoid those loud sounds, not a real solution--I'd rather
keep volume at 50% or something.
If I go to Audio Volume Settings->Audio Volume->Applications, I notice that
Notification Sounds are set to 0%, and I cannot change that setting--when I try
and rise it to whatever value, it goes back to 0%. I don't know whether this
is somehow realted to my issue, though.
Is anyone experiencing my same issue with KDE on stretch?