Sound settings don't remember my preferred audio output device

Sound settings don't remember my preferred audio output device.

Every time I (manage to) connect a bluetooth audio device, the default output remains the built-in PC speaker. Same when I connect USB audio devices... Ubuntu sticks to the built-in speakers until manually set otherwise.

This is a bug rather than opinion because there are at least three ways that Ubuntu could be better prioritizing audio devices:
  1. Prefer what the user manually selected last; or
  2. Prefer what the user dragged to the top of the list (a missing feature, but nice idea); or
  3. Prefer what audio device appeared in the list most recently.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: gnome-control-center (not installed)
ProcVersionSignature: Ubuntu 4.8.0-52.55~16.04.1-generic 4.8.17
Uname: Linux 4.8.0-52-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Mon May 22 17:23:59 2017
InstallationDate: Installed on 2017-05-19 (2 days ago)
InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)