In the past week I seem to be having an issue with the Apple TV remote acessing PIK TV content when using the TV guide. It either scrolls slow or not at all. It sometimes doesn't allow me to play a channel once selected. My remote is fully charged and it works everywhere else.
Although a bit of a kludge to use, mine (same ATV unit, same remote, but a few years old) works as expected. I'm now wondering if there is a difference between new and old versions of the device(s).