Hey Jordy, yeah, this feature should definitely work!
Are you the admin of the blog in question (with full Dashboard permissions)? If so, is it possible you could grant us the credentials to your WordPress's Dashboard, so we could replicate the problem and hopefully spot the cause of this problem?
Since we really haven't got that many of these kind of problems (actually, you're the first one with this particular one), we are really eager to get to the bottom of this as soon as possible.
Let us know if this is something we could work upon. Here's my email address: firstname.lastname@example.org
Again — thanks for the heads up and we're looking forward to your reply!