pipewire-pulse: Sometimes doesn't set link status to playing
This is happening sporadically in WebKitGTK apps (GNOME Web), when playing HTML5 videos with sound, the GStreamer PA audio sink is not muted and its volume is not zero, but the user hears nothing. It's easy to reproduce on F34 with the Epiphany devel flatpak, playing youtube videos for instance.
Sometimes, if the user is patient enough to wait several seconds, audio rendering would start, after around 10 seconds.