Looks like I've found the reason for this. Seems to be the timing which is somehow different on your side to what I saw before. Will give some more details later today where to get the updated pulseaudio packages from to test on your side.
** Tags added: bluetooth-ota9 bluez5 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1519809 Title: No sound is routed to bluetooth headset after a call To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1519809/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs