Hey, I saw similar posts, but did not find exactly my problem mentioned.
So far I connected my xbox one with my TV (Samsung) via HDMI and the ST300 via HMDI ARC to my TV. Problem I found is xbox one does not "see" the ST300 and always flips back the sound setting to "stereo uncompressed".
Then I started some testing
a) connect the xbox directly to the st300 via HDMI IN -> setting in the xbox still always flips back from bit stream to "stereo uncompressed".
b) connect the xbox via the optical cable to st300 -> wow. Great sound, but now I would need to be able to switch between optical and HDMI input in the st300. Based on what I foundin other threads this is not possible by bose design.
Have others seen this problem and was anybody able to fix this?