@gafisher,
Thank you for bringing this to our attention. I was able to reproduce this issue on my end – however, when using Brave Dev builds, the site worked as intended and I’m able to play music via Prime music without issue.
I think that the fix for this will come “for free” in future updates. Generally, if something doesn’t work in Release and is tested i Nightly/Dev builds and works – the fix that allows it to work will get pushed into release as it moves down the pipeline.