comments of public shared link

I have shared a link to a file in my asset library.  In the advanced options, I have clicked the box to allow comments, however, the person receiving the link is unable to leave comments.  The comment box is available, but when a comment is left and submit is clicked, nothing happens.  I have tested this myself and get the same result.  Anyone have any ideas?  There are not a lot of options in the share, public link and check a box so pretty sure its nothing I am doing wrong.  When I am logged into my Creative account, I can put comments on the file.  Some kind of permissions issue occurring in the background.  I have tried this as not logged in as a member, and as logged in as a free member, not a subscriber to CC, neither works