Upgrade to PulseAudio 12.2 in cosmic:
https://www.freedesktop.org/software/pulseaudio/releases/pulseaudio-12.2.tar.xz
Upgrade to PulseAudio 12.2 in cosmic:
https:/ /www.freedeskto p.org/software/ pulseaudio/ releases/ pulseaudio- 12.2.tar. xz