Comment 3 for bug 1736889

I can reproduce this in 18.04 amd64.

- open Sound Preferences
- select any sound theme
- move alert volume slider all the way to the right
- open Pluma
- press cursor up
=> sound plays at max volume (ok)
- move altert volume slider in Sound Preferences halfway down
- click on Pluma again
- press cursor up
=> sound still plays at max volume (expected: half volume)