It sounds like the main problem here is that it's defaulting to low quality audio mode (which is headset mode with microphone support). And you were expecting high quality audio mode by default.
You can select that manually in: Settings > Sound > Output > Profile ... ** Tags added: a2dp -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845046 Title: [WH-1000XM3, playback] Hearing input and output audio until disconnecting and reconnecting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1845046/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs