It's a major issue going back about 2 days since the the latest DeoVR update affecting the sound.
So far the main studios affected are:-
SinsVR
SexbabesVR
Lilly Bella VR
PlayfulVR
All of the latest scenes from these studios have no sound when streaming and affects the latest scenes from when AV1 was introduced, they used to be fine before the update, so it's a DeoVR bug.
There's loads of them...