HS is appearing when editing the first-level book node (it should not)

Well, I had tested it with and without the HS Book module enabled and got my impressions (since I'm new to Book module too).

Without it, in the first-level book node when editing does not appear any selection widget for parent (since I understand that this document is the root, it can't be moveable).

With HS Book activated, it appears between title and body, but without label and help text (what gives even more impression that it should not be there). Also, trying to choose any value with it makes the widget be reset right after.

PS: There is an error here in the Component field option... You should be drinking it too much :D