Roku 4 (Ultra/Premiere+) - Atmos/DTS 7.1 downmixed to AAC stereo, not AC3 5.1 with Sonos [SOLVED]

I can confirm version 6.7.15 that was published to the official channel on 02-Mar-21 fixes this issue. Thanks to all that contributed to the fix. I consider this issue SOLVED. :grinning: