On/Off sound is sometimes played without interaction

[Kibubu]

The on/off sound is sometimes played without interaction either by icon or shortcut. Don't know if the state changes according to the sound, or just the sound is played.

Multiple system sound sources can be seen in Gnome's sound settings. Picture bellow shows two entries but I also have seen four entries.

If nothing to say is uninstalled and Gnome restarted this issue does not occur.