Export permissions configuration when used with Features module

Yeah, I selected the permissions themselves, and Features auto-detected that Custom Permissions (config_perms) was a dependency along with ctools.

From looking at the module produced, I get the permissions defined as follows...

/**
 * @file
 * permissions_view_contact_enquiries.config_perms.inc
 */

/**
 * Implementation of hook_config_perms().
 */
function permissions_view_contact_enquiries_config_perms() {
  $export = array();

  $config_perms = new stdClass;
  $config_perms->disabled = FALSE; /* Edit this to true to make a default config_perms disabled initially */
  $config_perms->api_version = 1;
  $config_perms->machine_name = 'view_contact_enquiries_of_type_charity_cup_enquiry';
  $config_perms->status = TRUE;
  $config_perms->name = 'view contact enquiries of type: charity cup enquiry';
  $config_perms->path = array(
    0 => 'company/contact-us/entries/charity-cup',
  );
  $export['view_contact_enquiries_of_type_charity_cup_enquiry'] = $config_perms;

  // Repeat for all custom permissions
  
  return $export;
}

The .info file correctly specifies the permissions themselves along with the dependencies.

When I export 'standard' permissions (ie, those not created with the Custom Permissions module), then the following function is included instead:

/**
 * Implementation of hook_user_default_permissions().
 */
function configuration_permissions_user_default_permissions() {
  $permissions = array();

  // Exported permission: access comments
  $permissions['access comments'] = array(
    'name' => 'access comments',
    'roles' => array(
      0 => 'administrator',
      1 => 'anonymous user',
      2 => 'authenticated user',
      3 => 'pre-authorised',
    ),
    'module' => 'comment',
  );

  // Exported permission: access rules debug
  $permissions['access rules debug'] = array(
    'name' => 'access rules debug',
    'roles' => array(),
  );

  // Repeat for all other permissions

  return $permissions;
}

So am I missing something? Is this supposed to work? Cheers for your time.