Hello, I have just contributed to the bug report linked on the last comment. I'd also like to ask the maintainer to change the severity of this bug into something that is release-critical to prevent this version from reaching stable. Please understand that in the current version the entire audio system is broken at the moment you plug headphones in or out - which is something many of us do everyday, many times per day. This means the audio system is possibly requiring a normal user to reboot the system just to have sound working on his computer if he doesn't know how to manage the service, hence it's not at all suitable for Debian stable.
Also a quick fix for those experiencing the issue, from my recent comment on the link above. The following terminal command will restore audio to your system after you jack your headphones in or out: pulseaudio --kill;pulseaudio --start
