I have changed my setup to route all my video playbacks audio to a bus (B) which is in turn routed to the Master, giving me a group volume control over all the video playback inputs.
I take each individual video out of the M bus and send only the B bus.
I have the M activated on the B bus so that it in turn sends to the master.
However, my remote guests via vmixcall, cannot hear the video audio.
Even though they are being sent the Master output and the B bus is routed to the Master.
The only way they can hear it is if I route the individual videos to M or send them the B bus as audio source in the VMIXCall audio feed setting. Which sets me back to square one, having to control each video volume separately

This is not expected behaviour, submixing the videos seems to remove them from their monitor path, whereas I would expect as they are being sent the master audio that they should hear the output of Bus B which is also routed to the master - this would be my expected result, if I was using a hardware mixer.

Am I misunderstanding the routing?