I had the same problem while running Windows 10 21H2. Out of desperation I uninstalled all of my audio and USB drivers. After reinstalling them all, the problem went away. Coincidence or there was a conflict, I don't know but it now works as it should.
hey guys, I've had an important update from Poly Official Support (thank you moderator!)
It seems to have fixed my issue, I'm under testing but it should be ok.
Disable the "Intel® Smart Sound Technology BUS" (not USB) driver on you computer, restart it and enjoy!
There is a KB article talking about that:
Let me know if you have solved.
Your link is broken, however the steps fixed it for me.
I left the intel drivers disabled just in case, with no ill effects so far.
On my PC (french), they are named :
Technologie Intel Smart Sound pour audio Bluetooth
Technologie Intel Smart Sound pour audio USB
Technologie Intel Smart Sound pour microphones numériques