For whatever reason, YouTube no longer accepts streams if I send only Bus MA. I don't really recall if this is a new issue or I just made some change recently with my setup and this never worked. Is there any where to get setup vMix to stream Bus MA to YouTube as 1 single mono audio stream?

Looking for an easy way to to have a separate stream that I throw to for commercial break so that YouTube hears the commercials, but not the hosts and vMix Call guests talking while in commercial break. Sending Bus MA works fine for Twitch weirdly. I had set up so that I just turn off audio for Master when I throw to commercial break so that hosts can talk without going over the stream or hear the commercial audio.