diff --git a/core/misc/ajax.es6.js b/core/misc/ajax.es6.js
index 6248e46efe..1cdbfc8d6b 100644
--- a/core/misc/ajax.es6.js
+++ b/core/misc/ajax.es6.js
@@ -706,7 +706,7 @@
     // when there is a form such that this.$form.ajaxSubmit() is used instead of
     // $.ajax(). When there is no form and $.ajax() is used, beforeSerialize()
     // isn't called, but don't rely on that: explicitly check this.$form.
-    if (this.$form) {
+    if (this.$form && $.contains(document, this.$form.get(0))) {
       const settings = this.settings || drupalSettings;
       Drupal.detachBehaviors(this.$form.get(0), settings, 'serialize');
     }
@@ -885,7 +885,7 @@
     // attachBehaviors() called on the new content from processing the response
     // commands is not sufficient, because behaviors from the entire form need
     // to be reattached.
-    if (this.$form) {
+    if (this.$form && $.contains(document, this.$form.get(0))) {
       const settings = this.settings || drupalSettings;
       Drupal.attachBehaviors(this.$form.get(0), settings);
     }
@@ -955,8 +955,9 @@
     $(this.wrapper).show();
     // Re-enable the element.
     $(this.element).prop('disabled', false);
-    // Reattach behaviors, if they were detached in beforeSerialize().
-    if (this.$form) {
+    // Reattach behaviors, if they were detached in beforeSerialize(), and the
+    // form is still part of the document.
+    if (this.$form && $.contains(document, this.$form.get(0))) {
       const settings = this.settings || drupalSettings;
       Drupal.attachBehaviors(this.$form.get(0), settings);
     }
diff --git a/core/misc/ajax.js b/core/misc/ajax.js
index 5ea52425be..40bb135aff 100644
--- a/core/misc/ajax.js
+++ b/core/misc/ajax.js
@@ -325,7 +325,7 @@ function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr
   };
 
   Drupal.Ajax.prototype.beforeSerialize = function (element, options) {
-    if (this.$form) {
+    if (this.$form && $.contains(document, this.$form.get(0))) {
       var settings = this.settings || drupalSettings;
       Drupal.detachBehaviors(this.$form.get(0), settings, 'serialize');
     }
@@ -423,7 +423,7 @@ function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr
       }
     }
 
-    if (this.$form) {
+    if (this.$form && $.contains(document, this.$form.get(0))) {
       var settings = this.settings || drupalSettings;
       Drupal.attachBehaviors(this.$form.get(0), settings);
     }
@@ -465,7 +465,7 @@ function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr
 
     $(this.element).prop('disabled', false);
 
-    if (this.$form) {
+    if (this.$form && $.contains(document, this.$form.get(0))) {
       var settings = this.settings || drupalSettings;
       Drupal.attachBehaviors(this.$form.get(0), settings);
     }
diff --git a/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php b/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php
index e48487a6ed..44042cdf9c 100644
--- a/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php
+++ b/core/modules/views_ui/tests/src/FunctionalJavascript/FilterCriteriaTest.php
@@ -71,6 +71,21 @@ public function testFilterCriteriaDialog() {
     $this->drupalGet('admin/structure/views/view/who_s_online');
     $page = $this->getSession()->getPage();
     $this->assertNotNull($page->findLink('User: Last access (>= -15 minutes)'));
+
+    // Add group again to test drag-n-drop.
+    $create_new_filter_group = $page->findById('views-add-group-link');
+    $this->assertTrue($create_new_filter_group->isVisible(), 'Add group link found.');
+    $create_new_filter_group->click();
+    $assert_session->assertWaitOnAjaxRequest();
+
+    // Validate dragging works correctly and the new group will contain the new
+    // filter.
+    $dragged = $page->find('css', ".tabledrag-handle");
+    $target = $page->find('css', '.filter-group-operator-row');
+    $dragged->dragTo($target);
+
+    $remove_link = $page->findLink('Remove group');
+    $this->assertFalse($remove_link->isVisible(), 'Remove group should be invisible after drag.');
   }
 
 }