Button shows muted after the pipewire-pulse service is restarted
Fix: comment out a line in the function pulseaudio_volume_sink_info_cb in the file pulseaudio-volume.c. //if (volume->sink_connected) g_signal_emit(G_OBJECT(volume), pulseaudio_volume_signals[VOLUME_CHANGED], 0, TRUE);
The button is updated after 5 seconds.