diff -u b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php
--- b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php
+++ b/core/lib/Drupal/Core/Entity/Plugin/EntityReferenceSelection/DefaultSelection.php
@@ -258,7 +258,7 @@
         '#states' => [
           'visible' => [
             ':input[name="settings[handler_settings][sort][field]"]' => [
-              '!value' => '_none'
+              '!value' => '_none',
             ],
           ],
         ],
@@ -266,7 +266,7 @@
       if ($entity_type->hasKey('bundle')) {
         $form['sort']['settings']['direction']['#states']['visible'][] = [
           ':input[name^="settings[handler_settings][target_bundles]["]' => [
-          'checked' => TRUE
+            'checked' => TRUE,
           ]
         ];
       }