Surround Sound / 5.1 Broken in Netflix on tvOS 14?
So I have an AppleTV HD (4th Gen) running tvOS 14.0, and surround sound is broken on Netflix. I am pretty sure it was working forever before I upgraded to tvOS 14, which is why I just spent an hour and a half trying to fix it.
I enabled tvOS Developer tools to show the media stream HUD, and it is clearly outputting 2 channel audio for all Netflix content. Disney+ and HBOMax are clearly outputting Dolby Digital or PCM (e.g. 6 channels). I have tooled with all of the Netflix and tvOS settings, including signing into a totally different Netflix account - all to no avail.
It's notable that when I view a content item on the AppleTV, Netflix does not display the 5.1 icon. When I access Netflix via my PS3, it does display the 5.1 icon. See below.
Is Netflix surround sound broken on all 4th Gen AppleTVs with tvOS 14, or just AppleTV HDs, or is it just me?
Note absent 5.1 icon on AppleTV:
Note 5.1 icon on PS3: