Issue #3068719 by itamair: Attachments and Cacheability dropped for Leaflet (embeded|ajax) popups

        // Attach drupal behaviors on new content.

        Drupal.Leaflet[mapid].lMap.on('popupopen', function(e) {

          var element = e.popup._contentNode;

          $(element).once('leaflet-popup-behaviors-attached').each(function () {

          $(element).each(function () {

            Drupal.attachBehaviors(this, drupalSettings);

          })

        });