Issue #2350723 by rjacobs: State toggles for Enable alt/title and Require alt/title not functioning

core/modules/image/src/Plugin/Field/FieldType/ImageItem.php

@@ -269,7 +269,7 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
       '#weight' => 10,
       '#states' => array(
         'visible' => array(
-          ':input[name="instance[settings][alt_field]"]' => array('checked' => TRUE),
+          ':input[name="field[settings][alt_field]"]' => array('checked' => TRUE),
         ),
       ),
     );
@@ -287,7 +287,7 @@ public function fieldSettingsForm(array $form, FormStateInterface $form_state) {
       '#weight' => 12,
       '#states' => array(
         'visible' => array(
-          ':input[name="instance[settings][title_field]"]' => array('checked' => TRUE),
+          ':input[name="field[settings][title_field]"]' => array('checked' => TRUE),
         ),
       ),
     );