XBOX App Update - REALLY REALLY quiet sound

Loving the look of the new update… HOWEVER…

Since the update, all media streamed from my media server on my Mac, to my XBOX one is ridiculously quiet.
I used to be able to watch everything (as in last night) on volume 15, now I’m on volume 45 and its STILL quiet.

its soooooo bad, any ideas?

and just to clarify games, tv etc. are all quite loud on volume 15 still.