Harmonica Play a long Help Me

Hi

Is anybody out there familiar with Notation in the Hal Leonard Harmonica Play along Series. I am looking at "Help me" in Vol 9. Right at the end of music on p24 there is a ghost note indicated. It appears that to be consistent with their notation this would a 1.5 note draw bend on the 5th hole. As this isn't possible can any body suggest what this is meant to indicate. I don't think it is a misprint as I have seen similar notation on at least one other occasion in their other books.

Thanks