Thank you for your bug report, it sounds similar to bug #1866194. Could you try if moving your ~/.config/pulse directory and restarting the session workaround the issue?
Could be useful to report it upstream on https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/ if you could -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875912 Title: Selected audio output always USB device as default, but no control To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1875912/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs