Ticket #23954: 23954.diff

wp-includes/js/media-views.js

@@ -3934 +3934 @@
 
                         // Handle checkboxes.
                         } else if ( $setting.is('input[type="checkbox"]') ) {
-                                $setting.attr( 'checked', !! value );
+                                $setting.attr( 'checked', !! value && value !== 'false' ); //check for false or string 'false'
                         }
                 },