This bug still exists in Ubuntu 15.10 and this package version:
Package: pulseaudio Version: 1:6.0-0ubuntu12
$ journalctl | grep pulseaudio oct. 02 11:05:12 vougeot pulseaudio[2182]: [pulseaudio] pid.c: Daemon already running. [...] oct. 02 11:05:26 vougeot pulseaudio[2954]: [pulseaudio] pid.c: Daemon already running.
This bug still exists in Ubuntu 15.10 and this package version:
Package: pulseaudio
Version: 1:6.0-0ubuntu12
$ journalctl | grep pulseaudio
oct. 02 11:05:12 vougeot pulseaudio[2182]: [pulseaudio] pid.c: Daemon already running.
[...]
oct. 02 11:05:26 vougeot pulseaudio[2954]: [pulseaudio] pid.c: Daemon already running.