Strange Behavior with es picture comment

Hi guys, I am seeing strange behavior after posting a comment picture. The link of that image is http://www.mysite.com/media/com_easysocial/comments/382/dexter_by_blizz21-d4pq4jw.png. After browsing a few pages of the site, the link of that image change to http://mysite.mysite.netdna-cdn.com/media/com_easysocial/comments/381/dexter_by_blizz21-d4pq4jw.png which resulted of that image thumb to be broken and no longer showing in the comment.
Any ideas?