No, the golden hour is defined as sun elevations between 6 degrees above and 4 degrees below the horizon. So the golden hour does start before the sunset and also continues until after sunrise. The entire time range in orange is the Golden Hour. Also, in very high latitudes the entire day might be "golden hour" as the sun never reaches higher than 6 degrees above the horizon.
(Also see the screenshot in the original post, it was always this way ;) )