diff --git a/addons/website_event/static/src/js/website_event.js b/addons/website_event/static/src/js/website_event.js
index 36c0f5df526..527d954c524 100644
--- a/addons/website_event/static/src/js/website_event.js
+++ b/addons/website_event/static/src/js/website_event.js
@@ -77,8 +77,16 @@ publicWidget.registry.EventRegistrationFormInstance = publicWidget.Widget.extend
      */
     start: function () {
         var def = this._super.apply(this, arguments);
-        var instance = new EventRegistrationForm(this);
-        return Promise.all([def, instance.attachTo(this.$el)]);
+        this.instance = new EventRegistrationForm(this);
+        return Promise.all([def, this.instance.attachTo(this.$el)]);
+    },
+    /**
+     * @override
+     */
+    destroy: function () {
+        this.instance.setElement(null);
+        this._super.apply(this, arguments);
+        this.instance.setElement(this.$el);
     },
 });