I am running the latest Apple TV app (4.5 I believe) and the latest tvOS (10.0.1).
I like to browse my movies by genre. (It's sort of annoying that genre browse is tucked away in the More menu, but that's another matter.) However this does not work for just one genre--Sci-Fi & Fantasy. Nothing happens when I select that genre. Every other genre works.
I have tried uninstalling and re-installing the app on the Apple TV, and restarting the app, and restarting the Apple TV. Also, I can filter by genre on the iOS apps (I have tested on both iPhone and iPad) and in the web app.
I theorize that this may have to do with the ampersand. Or it may be because Sci-Fi & Fantasy is alphabetically last in my genres or something. Anywaty this seems like an obvious bug.