In Home Streaming has no sound when client finds 5.1 stream

[muppets4]

I have my client set at auto, and rightfully it finds a 5.1 setup. Everything else functions (other games that I stream). When I let it at auto there is no sound in Big Box. Not in the menu and not in started games. When I force it at stereo there is sound again. When I open a remote desktop and then open Big Box there is sound too. So no 5.1 sound.