Using 2.20.1, the snap was rebuilt using xenial libraries and now has pulse 8.0. This had no effect. Putting the profile in complain mode also had no effect. It appears the snap is not using pulseaudio and trying to fallback to alsa, but the alsa configuration doesn't exist in the core snap, so that fallback doesn't work.
Using 2.20.1, the snap was rebuilt using xenial libraries and now has pulse 8.0. This had no effect. Putting the profile in complain mode also had no effect. It appears the snap is not using pulseaudio and trying to fallback to alsa, but the alsa configuration doesn't exist in the core snap, so that fallback doesn't work.