It's a super non-critical bug. It's easily user bypassable. In my case with an HP laptop with Intel on-board audio, if I shut down with the headphones plugged in and start with headphones unplugged the sound stays selected to headphone jack. Even if I play with the volume slider. The fix for me was to plug and unplug the headphones.
The question, do I report it to alsa or pulse? I don't know who is responsible for output selection logic.
EDIT: After some googling involving the terms jack, jack-sense, intel, and intel-hda I found that there are several open bugs for Alsa that are marked in a non-dismissive way. Ex: https://bugzilla.redhat.com/show_bug.cgi?id=540402 ... So it appears Alsa is the right place.