Change WordPress user roles and capabilities › Forums › Bug Reports › Edit restriction capabilities with USR not working with The Event Calendar Pro › Reply To: Edit restriction capabilities with USR not working with The Event Calendar Pro
URE applies edit restrictions to all existing custom post type even if you input to a user profile just ID of event. If Event Calendar Pro (ECP) uses custom post type to store attendees, I may suppose that URE applies edit restrictions to it. And once user can not edit attendees, he does not see them. If my assumption is correct post type exclusion filter may help you.
To give more exact conclusion I need access to ECP plugin copy.