When I share my screen the little "meeting window" on the bottom right is unresponsive. I can't minimize it, can't cast to full screen. If someone shares their screen they can see my cursor moving on their screen but I can't see their screen. Windows 10 latest update, and I have a feeling that Windows 10's scaling messes it up for me, because I've got a 28" UHD monitor which I have to scale up to 175%