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SUMMARY

When I went to mute the Notification Sounds stream, to get rid of the farting noise of the "System Bell" I could see it was Unmuted, I clicked to Mute it, but it appeared that nothing happened. Unpon closing and re-opening the `systemsettings kcm_pulseaudio` it displayed as Muted. It seems that the Muted/Unmuted icon does not re-read the setting and refresh the icon displayed, when you click on it. 

Underneath, the setting does appear to change.

STEPS TO REPRODUCE
1. From a terminal: systemsettings kcm_pulseaudio
2. Scroll right hand panel down to : Playback Streams | Notification Sounds
3. Click on the Mute Notification Sounds speaker button under the Bell Icon.
4. The Mute Notification Sounds Icon flashes, but does not change to the red top-left to bottom-right red strike-through Icon 
5. Close and re-open: systemsettings kcm_pulseaudio
6. Playback Streams | Notification Sounds now displays as Muted with the red top-left to bottom-right red strike-through Icon
7. The same behaviour of change of setting without visual feedback happens when un-muting it too.

OBSERVED RESULT

Mute/Unmute Icon does not change to the red top-left to bottom-right red strike-through

EXPECTED RESULT

Mute/Unmute Icon should toggle between Unmuted Speaker and Red top-left to bottom-right red strike-through
of speaker

SOFTWARE/OS VERSIONS

Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.0-29-amd64 (64-bit)
Graphics Platform: offscreen
Processors: 12 × 13th Gen Intel® Core™ i7-1365U
Memory: 31.0 GiB of RAM
Graphics Processor: Mesa Intel® Graphics


ADDITIONAL INFORMATION