On the Apple TV Client:
Sometimes when I was trying to scroll down the sidebar to Settings, I would get to the Sidebar item right above Settings, then when I would try to scroll down one more, it would kick me out of the Sidebar back to the main screen. Could not access the Settings section.
It was inconsistent, so I played with it until I nailed down when:
If the main screen on the display is a long list of items, and therefore scrollable, then I would get kicked out of the Sidebar and back to that main screen.
If the main screen is displaying something that is not a long list, and therefore non-scrollable, then I can click down to the Settings on the Sidebar.
I'm new to Channels, enjoying it quite a bit!