So most of the time, when I'm flying toward a station in supercruise, I'll be slowing down and watching the distance scale go from LS, to Mm and then, as soon as it gets to Km it's time to turn off my FSD. But sometimes I'll get the nod to disengage FSD when I'm a lot further out, like 10Mm or more. Is this a bug or am I accidentally doing something I haven't noticed?