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
@@ -490,7 +490,7 @@
       '#theme_wrappers' => ['container'],
       '#attributes' => ['class' => ['entities-list']],
       'remaining' => [
-        '#markup' => '<p>' . $this->getCardinalityMessage($entities) . '</p>',
+        '#markup' => $this->getCardinalityMessage($entities),
       ],
       'items' => array_map(
         function (ContentEntityInterface $entity, $row_id) use ($field_widget_display, $details_id, $field_parents) {