Ticket #26445: 26445.patch

src/wp-content/themes/twentyfourteen/js/featured-content-admin.js

@@ -4 +4 @@
  */
 /* global ajaxurl:true */
 ( function( $ ) {
-        $( '#customize-control-featured-content-tag-name input' ).suggest( ajaxurl + '?action=ajax-tag-search&tax=post_tag', { delay: 500, minchars: 2 } );
+        $( function() {
+                $( '#customize-control-featured-content-tag-name input' ).suggest( ajaxurl + '?action=ajax-tag-search&tax=post_tag', { delay: 500, minchars: 2 } );
+        });
 } )( jQuery );