TeamViewer Mac: Recording does not pickup guest audio during Presentation meeting

Hi everyone!  I just started teamviewer but I'm already a fan. It basically has everything I needed except that it can't record the audio of the guests when I tried recording a Presentation. Only the host's voice was picked up. At first I thought this might be according to design since it's a presentation (Host do most of the talking!) but when one of my teammates hosted a presentation using Windows, all of our audios were picked up by the recording. 

Is this some sort of Mac limitation? Or I missed a configuration?  I would really appreciate it if you can help me on this. Thanks!