I have Nova 5X White edition for my XSX which I got from a deal on OZB. Has been working fine since I got them but I get this issue. I go to use them, turned them on and got the normal pop up on my Xbox saying they are connected but there was no sound through them either in game or on Xbox dashboard.
Turned them off and the sound is there, turned them back on got pop up saying connected but no sound.
They are up to date and so is dongle, dongle light is bright white when connected, it’s on 2.4 Xbox mode, fully charged.
The only fix was unplugging the dongle which may sound like an easy fix but that’s not the point. This shouldn’t be happening at all.
Has happened a few times now and is becoming a real pain!
Sounds like you should open a support ticket with SteelSeries