Ticket #39098: 39098.0.diff

src/wp-includes/js/customize-preview.js

@@ -138 +138 @@
                  */
                 handleLinkClick: function( event ) {
                         var preview = this, link, isInternalJumpLink;
-                        link = $( event.target );
+                        link = $( event.target ).closest( 'a' );
 
                         // No-op if the anchor is not a link.
                         if ( _.isUndefined( link.attr( 'href' ) ) ) {