Atmos dropping out on Xbox One S

I have the same problem - I have my Xbox one S connected to my ATMOS enabled LG 2017 TV and then to the Atmos enabled SJ9 via ARC and neither sound output is recognised as supporting Atmos by the Xbox when I try to enable it as the bitstream out format.
A direct connection of the xbox to the SJ9 via the HDMI in connection also fails. Bitstream out with Dolby digital works fine.

Atmos works fine from other sources.

Thanks.

No call backs just fix atmos on xbox..i am computer technician over 15 years not green on consoles etc..i have try to fix this multiple different ways and nothing i have try dont fix it...only if i take atmos off on xbox problem goes away. I thought maybe
if i buy xbox one x it would work better on that, but founded out that xbox one x has same problems all over the world than xbox one s. I have started to think about to buy sony ultra hd bluray player with atmos and solding xbox one s. I have struckled with
this ever since atmos came on xbox..

Hi Mr. Spot,

Thank you for coming to the forums, I'd be happy to help.

For troubleshooting purposes, do you think you can connect your Xbox to your projector directly with a simple setup taking the AVR out of the picture for a second?

I would suggest a
soft factory reset of the console to restore it back to defaults while keeping your games and apps installed just to try all of the available options. You will just need to set up some settings again and re-add your account.

Once you reset the console I suggest re-connecting your set up again:
https://support.xbox.com/en-US/xbox-one/live-tv/connect-console-to-home-theater

Let us know if the picture drops when directly connected to the projector via HDMI.

Thanks Diego,

I don't think testing the Xbox direct to the projector is going to be very practical. For one, the video drop out doesn't occur every time I use the console. Maybe every 4 or 5th day of use. So doing this would require long term testing, and that means
no sound, as I need my AVR for my 7.1.4 atmos setup. Can't imagine sitting there for hours/days watching a picture with no sound to see if the picture drops. Sounds like a very boring job...

I'll try the soft factory reset next time it occurs (I have the Xbox controlling all my devices as well, so that's going to mean reprogramming all that as well). Hopefully it works, but if not I'd say its an issue with the Xbox and I'm hoping to hear from
some others to verify.

I'm using a Monster UltraHD Gold 35ft cable from the AVR to Projector. Although this is a $300 AUD cable, I wonder if its not accepting the full bandwidth required for HDR and 4K 60Hz... But then the video has dropped out streaming 1080p content from my
NAS, which certainly wouldn't be pushing the bandwidth of the cable. And I know the difference between my WiFi not keeping up versus this issue. I wanted a HDMI 2.1 cable for future proofing as access is very difficult for feeding the cable, but unfortunately
its still not possible to get one in that length.

Hi Mr. Spot,

Apologies, I was not aware this does not happen every day and only after a few days of usage.

It's possible the length of the wire may be a factor, since the data has to travel farther but the cable you have is high speed so this is just a suggestion that the length could be a factor. Usually we recommend to just go with the high speed cable included
with the Xbox One X, but I figure your projector and AVR setup requires you to have a longer cable and I understand wanting it to work without any picture drops.

If it happens again, try the soft factory reset and let us know if you notice any improvements after a few days.