Patch #4 applied, Issue #3169590

inline_entity_form.module

@@ -371,7 +371,7 @@ function template_preprocess_inline_entity_form_entity_table(array &$variables)
   $first = TRUE;
   foreach ($fields as $field_name => $field) {
     $column = [
-      'data' => $field['label'],
+      'data' => isset($field['label']) ? $field['label'] : NULL,
       'class' => ['inline-entity-form-' . $entity_type . '-' . $field_name],
     ];
     // The first column gets a special class.