Add new field_collection entity: The title uses not the label calback defined for the entity

When I add a new field_collection item in a content typ, the title is like "Add FIELD_COLLECTION_FIELD_LABEL_NAME". I have to set additional information for the add, edit and delete title. For this case I have altered the label calback for field_collections:

/**
 * Implements hook_entity_info_alter().
 */
function my_module_entity_info_alter(&$entity_info) {
  // Change the label callback for field collection to provide a better label name
  if (isset($entity_info['field_collection_item'])) {
    $entity_info['field_collection_item']['label callback'] = 'my_module_content_field_collection_label';
  }
}

This works great for edit and delete but not for add, because add does not use the $entity->label() function to generate the "Add ..." text and the defined label callback is not invoked.