HDCP not working with USB-C Digital A/V Adapter?

I've got the new MacBook and Apple's USB-C Digital A/V adapter. I plugged into an HDMI monitor that I previously used with my MacBook Pro and a monoprice Mini DisplayPort to HDMI adapter. I tried watching Netflix today and got an HDCP error when I tried to watch anything. It played fine when I unplugged the monitor. I plugged my old MacBook Pro in and it worked fine.

Does the new HDMI adapter not support HDCP? Or does the new MacBook not support it? That would really suck either way.