Ellie, I had the same thing on all posts, they stopped coming through a while back and this helped me get some of them going again.
I went to the wanted cards section, the main one that shows all the requests, and clicked on "Notify of replies" in the blue bar above the list. Then I chose "all posts" and clicked, update.
Hope it works for you, I seem to be getting the posts for the wanted cards again right now and I did get this one so I am guessing my doing the same under support worked too.
Pamela