Hi, I think this bug is fixed by the today's pulseaudio 12.2-3 update in Debian:
* Ship link from /etc/alsa/conf.d/pulse.conf to /usr/share/alsa/alsa.conf.d/pulse.conf. Upstream alsa decided to stop supporting the /usr path (Closes: #915696)
I cannot test right now, but only this week-end. Regards, -- Eugen
