diff --git a/core/modules/outside_in/js/offcanvas.js b/core/modules/outside_in/js/offcanvas.js
index 31881e1..6dac66c 100644
--- a/core/modules/outside_in/js/offcanvas.js
+++ b/core/modules/outside_in/js/offcanvas.js
@@ -110,7 +110,7 @@
    */
   Drupal.behaviors.offCanvasEvents = {
     attach: function () {
-      $(window).on({
+      $(window).once('off-canvas').on({
         'dialog:aftercreate': function (event, dialog, $element, settings) {
           if ($element.is('#drupal-offcanvas')) {
             var eventData = {settings: settings, $element: $element};