It doesn't help that Google's documentation on a lot of this is vague or nonexistent. The best thing Google can do is add more examples to their documentation.
Happened to us too, they changed how it worked so it doesn't show for all websites[1], just some, but we're still not sure if they took it off or if there's a bug in our code.
Worse still, it doesn't really seem to have affected our incoming traffic, so the whole thing was a complete waste of time and trying to fix it is now very low on the to-do list.
