Custom post type support solution

The topic about custom post type support was closed so I have to open a new one.

Here is the solution:

add_filter('pre_get_posts',"my_custom_shared_drafts");
function my_custom_shared_drafts($query) {
   if(!is_admin()) return; 
   $screen = get_current_screen();
   if($screen->base != "posts_page_shareadraft/shareadraft") return;
   $query->set('post_type',array('post','recipe'));
}

You should add this to your child theme functions.php or your custom plugin. Of course replace “recipe” with your custom post type slug.