Issue #3061620 by paper boy, mrinalini9: D8: Multiple forms submit/cancel closes all child forms

src/Plugin/Field/FieldWidget/InlineEntityFormComplex.php

@@ -1206,8 +1206,21 @@ class InlineEntityFormComplex extends InlineEntityFormBase implements ContainerF
    *   The form state of the parent form.
    */
   public static function closeChildForms(array $form, FormStateInterface &$form_state) {
-    $element = inline_entity_form_get_element($form, $form_state);
-    inline_entity_form_close_all_forms($element, $form_state);
+    // Get the button triggering this action.
+    $triggering_element = $form_state->getTriggeringElement();
+    // Slice off 'ief_edit_cancel' and 'actions' keys from it's array parents to
+    // get to the inline_entity_form.
+    $array_parents = array_slice($triggering_element['#array_parents'], 0, -2);
+    // Get the parent IEF form element of the triggering button.
+    $element = NestedArray::getValue($form, $array_parents);
+
+    // Find and close all nested IEF forms of the triggering element.
+    foreach (Element::children($element) as $key) {
+      $iefId = NestedArray::getValue($element[$key], ['widget', '#ief_id']);
+      if (!empty($iefId)) {
+        inline_entity_form_close_all_forms($element[$key], $form_state);
+      }
+    }
   }
 
   /**