I might have to switch to HDHR. I have a Plex server too. We kind of went all in on Tablo and bought a lifetime pass for TV listing data, so it makes it hard to switch.
It's especially frustrating as an AppleTV user because their app glitches out hard when you try to pause or rewind live TV. It'll keep jumping back to when you first started watching like hours before. I've messaged their support about it, but they blame Apple. iPhone app works fine though...