Volume doesn't get zeroed upon disconnecting last output device/sink

[Jorenar]

Like in the title: when you disconnect all sinks, the volume on the bar instead of getting zeroed, gets stuck with the value of last sink.

Applies to both PulseAudio and WirePlumber modules.

$ waybar -v
Waybar v0.14.0
$ uname -a
Linux alpha 6.17.6-arch1-1
$ sway -v
sway version 1.11
$ pipewire --version
pipewire
Compiled with libpipewire 1.4.9
Linked with libpipewire 1.4.9
$ wireplumber --version
wireplumber
Compiled with libwireplumber 0.5.12
Linked with libwireplumber 0.5.12
$ pipewire-pulse --version
pipewire-pulse
Compiled with libpipewire 1.4.9
Linked with libpipewire 1.4.9