With the untimely demise of Locast I have just switched to HDHomeRun Flex Duo. I and am able to watch live TV in Channels but I can't seem to be able to record from the Guide on the Apple TV app. Clicking on a program that hasn't aired has no effect. When I was using Locast it clicking on a program would bring up some recording options. Now it doesn't do anything.
It looks like I can set up season passes from the web interface, so the issue seems to be specific to the Apple TV app.
Apple TV 4K