Whenever I accidentally scroll too far down on my keyboard’s volume wheel which is extremely finicky and sometimes will very quickly do multiple scrolls down when I don’t want it to, I lose my audio balance. It’s annoying to fix everytime this happens. It doesn’t happen frequently but if it could be fixed I would be able to use my volume wheel without fear that my audio balance will disappear. Sometimes the volume change popup doesn’t appear when in some full screen games and that can also cause me to scroll to 0% accidentally, but that’s another issue that is probably the game’s fault.
To change the audio balance go to the sound section of system settings, then click on ‘show channels’ and you can change the balance of audio between each device. It is not perfect and different volumes will sound different but it makes things way better for me (damaged hearing in one ear).
I don’t know if KDE can even fix this or if this is something pipewire or another piece of software would have to fix but I am adjusting the balance inside of Plasma’s sound system settings.