Comment 11 for bug 1546310

I went through the logs now and found the cause for what you see (no audio on local or remote side).

We have lock in place which should keep the stream inside pulseaudio up while we're not really streaming anything through it as this completely done in software. However in your case the lock doesn't seem to be set ever. On my side I am getting the following line

Mar 2 08:28:37 ubuntu-phablet pulseaudio[2142]: [pulseaudio] module-bluez5-device.c: Set bluetooth.hsp.prevent.suspend.transport true (ret 1)

in my syslog however in your case I can't really fine it. This is quite essential for the audio setup to work properly. Will do some more investigation to see if I find a reason for this.