[BUG] Big Picture disrupting game audio

[NotTameem]

Hello!! Here is a bug I have found

Issue:
When Big Picture mode is set to another monitor game audio is muted on most games.
I currently have Big Picture mode running from my desktop to my bedroom with a 60ft fiber optic HDMI to my TV (monitor 3)

Big Picture mode is set to only open on monitor 3 (my TV)

I also have a physical steamlink device connected to my internet via ethernet cable and I use this in no stream mode to connect my Xbox Series X controller to my desktop

diagram:
Fiber Optic HDMI
Desktop------------------------------>TV--->sound system(eARC)
|
L------------------------------------->Steamlink
ethernet

Big Picture mode has all the current sounds coming through the TV speakers there is absolutely no disruption there.

When I play games via BP on my TV it's random what games have sound and which don't. For example Persona 4 Golden has no sound at all. Amid Evil only has sound during the intro video, Destiny 2 has sound all the time and Soulcaliber has no sound at all.

I have disabled all audio devices except my TV and have an audio switcher set up as well

I know the issue is big picture mode because I did various testing, for Persona 4 Golden I ran it without BP and manually set it to Monitor 3 and it's sound to my TV speakers and all sound came through

OS

Windows 10

Steps:
-Verify desktop and steam are open
-Turn on TV(monitor 3)
-turn on Steamlink
-connect controller
-with steamlink activate steam on desktop
-All sounds come through go to library and select random installed game
-see if any sound comes through
-even when a game is silent verify steam big picture is still outputting sound (it is)

Results:
No game audio plays through speakers or only the intro comes through

Expected:
All games to have all audio

Hardware:
3080ti
5800x

I've been at this for a week or two so hopefully this helps I would really like to get this resolved

thank you!!!

[NotTameem]

Fixed it, Windows was outputting stereo instead of 5.1. Changed spatial audio to 5.1