diff -u b/src/Plugin/Field/FieldWidget/EntityReferenceBrowserWidget.php b/src/Plugin/Field/FieldWidget/EntityReferenceBrowserWidget.php
--- b/src/Plugin/Field/FieldWidget/EntityReferenceBrowserWidget.php
+++ b/src/Plugin/Field/FieldWidget/EntityReferenceBrowserWidget.php
@@ -489,9 +489,7 @@
     return [
       '#theme_wrappers' => ['container'],
       '#attributes' => ['class' => ['entities-list']],
-      'remaining' => [
-        '#markup' => $this->getCardinalityMessage($entities),
-      ],
+      '#prefix' => '<p>' . $this->getCardinalityMessage($entities) . '</p>',
       'items' => array_map(
         function (ContentEntityInterface $entity, $row_id) use ($field_widget_display, $details_id, $field_parents) {
           $display = $field_widget_display->view($entity);
only in patch2:
unchanged:
--- a/src/Plugin/Field/FieldWidget/FileBrowserWidget.php
+++ b/src/Plugin/Field/FieldWidget/FileBrowserWidget.php
@@ -213,6 +213,7 @@ class FileBrowserWidget extends EntityReferenceBrowserWidget {
     $current = [
       '#type' => 'table',
       '#empty' => $this->t('No files yet'),
+      '#prefix' => '<p>' . $this->getCardinalityMessage($entities) . '</p>',
       '#attributes' => ['class' => ['entities-list']],
       '#tabledrag' => [
         [