diff --git a/modules/json_form_widget/src/ArrayHelper.php b/modules/json_form_widget/src/ArrayHelper.php
index 687d48dd62..da2e87bd3e 100644
--- a/modules/json_form_widget/src/ArrayHelper.php
+++ b/modules/json_form_widget/src/ArrayHelper.php
@@ -190,6 +190,18 @@ protected function buildSimpleArrayElement(array $definition, $data, array $cont
     ];
   }
 
+  /**
+   * Flatten array element fieldset w/buttons for processing.
+   *
+   * @param array $element
+   *   A form element.
+   */
+  public static function flattenArrayElementFieldset(array &$element): void {
+    if (isset($element['field']) && $element['#type'] == 'fieldset') {
+      $element = ['#required' => ($element['#required'] ?? FALSE)] + $element['field'];
+    }
+  }
+
   /**
    * Returns single complex element from array.
    *
diff --git a/modules/json_form_widget/src/SchemaUiHandler.php b/modules/json_form_widget/src/SchemaUiHandler.php
index 75a0320f45..57d20ca5e4 100644
--- a/modules/json_form_widget/src/SchemaUiHandler.php
+++ b/modules/json_form_widget/src/SchemaUiHandler.php
@@ -173,7 +173,7 @@ public function applyOnBaseField(mixed $spec, array $element) {
       $element = $this->changeFieldDescriptions($spec->{"ui:options"}, $element);
       $element = $this->changeFieldTitle($spec->{"ui:options"}, $element);
       if (isset($spec->{"ui:options"}->hideActions)) {
-        $element = $this->flattenArrays($spec->{"ui:options"}, $element);
+        // $element = $this->flattenArrays($spec->{"ui:options"}, $element);
       }
     }
     return $element;
@@ -194,6 +194,7 @@ public function flattenArrays(mixed $spec, array $element) {
     unset($element['actions']);
     $default_value = [];
     foreach ($element[$spec->child] as $key => $item) {
+      ArrayHelper::flattenArrayElementFieldset($item);
       $default_value = array_merge($default_value, $this->formatArrayDefaultValue($item));
       if ($key != 0) {
         unset($element[$spec->child][$key]);
diff --git a/modules/json_form_widget/src/WidgetRouter.php b/modules/json_form_widget/src/WidgetRouter.php
index 5081b32d81..00a0663558 100644
--- a/modules/json_form_widget/src/WidgetRouter.php
+++ b/modules/json_form_widget/src/WidgetRouter.php
@@ -147,11 +147,7 @@ public function handleListElement(mixed $spec, array $element) {
    *   The dropdown element configured.
    */
   public function getDropdownElement(mixed $element, mixed $spec, mixed $titleProperty = FALSE) {
-    // Array elements may be fieldsets, since by default they are simple array
-    // elements with Remove/Up/Down buttons.
-    if (isset($element['field']) && $element['#type'] == 'fieldset') {
-      $element = ['#required' => ($element['#required'] ?? FALSE)] + $element['field'];
-    }
+    ArrayHelper::flattenArrayElementFieldset($element);
     $element['#type'] = $this->getSelectType($spec);
     $element['#options'] = $this->getDropdownOptions($spec->source, $titleProperty);
     if ($element['#type'] === 'select_or_other_select') {