I’ve been having this problem with my PowerNode 2i these past few months, where I plug in the headphones but I still have some sound coming through my speakers. Just a minor annoyance, nothing to get worked up about. This afternoons firmware update seems to have fixed the issue.
But while trying to test Amazon Music streaming I discovered that BlueSound now supports MQA! The Jazz Re:Fest 2020 is set to stream out of the UK on August 23.