I created a role on WordPress which has the right to create posts but can't edit published posts. Backend submission is working fine, but Frontend submission allows users without the granted "edit_published_posts" right to edit published posts. That's a problem, because users can change published posts without any approval, and it's a huge security risk too. Please add an option to the plugin to prevent users from editing published posts. Alternatively, the status of the post should be changed to unpublished if edited by users after they are already published.