Ticket #19077: 19077.patch

wp-admin/includes/screen.php

@@ -500 +500 @@
                 $screen->id         = $id;
                 $screen->base       = $base;
                 $screen->action     = $action;
-                $screen->post_type  = $post_type;
-                $screen->taxonomy   = $taxonomy;
+                $screen->post_type  = !empty( $post_type ) ? $post_type : $GLOBALS['typenow'];
+                $screen->taxonomy   = !empty( $taxonomy ) ? $taxonomy : $GLOBALS['taxnow'];
                 $screen->is_user    = is_user_admin();
                 $screen->is_network = is_network_admin();