Duplicate audio devices appearing when clicking sound icon in system tray

See here: Pipewire* 1:0.3.77-1 duplicates plasma-pa entries (on disconnect/reconnect) and breaks sound control

It is an issue with the latest pipewire. Has been identified and solved upstream, just wait for the next release and in the meantime either downgrade all pipewire relevant packages or restart your plasmashell service every time it happens.