My node2i friend, i have the same issue, BUT i just had this from bluesound "
Thank you for getting back to me with the update.
In this case, to help me better understand the situation may you please pair your Node 2i to your B&W earphones via Bluetooth.
Then, play a song from one of the music streaming services on our BluOS Controller App to your earphones, and once the song finishes please pause the playback.
From here, may you please then send me a diagnostics log from your Node 2i.
Please ensure that you are able to see and select your Node 2i under the "My Players" drawer (house-shaped icon) within our BluOS Controller App before proceeding.
You can send this log by going to Help -> Send Support Request in the BluOS app. You can find this on the left side of the desktop app or by selecting the 3 lines in the top left corner of the mobile app."
I have just sent the logs...They should be able to prove the node2i is transmitting in aptx hd, and the issue is with the Pi7, so we can go back to B&W with evidence.