ResultCache not working with i18n behavior

Article:
  actAs:
    Timestampable:
    Sluggable:
      fields:   [date, title]
    I18n:
      fields:       [title, content]
      actAs:
        Sluggable:
          fields:   [title]
          uniqueBy: [lang, title]
  columns:
    title:          string(255)
    date:           date
    content:        clob

public function configureDoctrine(Doctrine_Manager $manager)
{
  if (sfConfig::get('sf_cache') == true)
  {
    $cacheDriver = new Doctrine_Cache_Apc();
    
    $manager->setAttribute(Doctrine::ATTR_QUERY_CACHE, $cacheDriver);
    $manager->setAttribute(
      Doctrine::ATTR_QUERY_CACHE_LIFESPAN,
      sfConfig::get('app_cache_lifetime', 86000)
    );
    $manager->setAttribute(Doctrine::ATTR_RESULT_CACHE, $cacheDriver);
    $manager->setAttribute(
      Doctrine::ATTR_RESULT_CACHE_LIFESPAN,
      sfConfig::get('app_cache_lifetime', 86000)
    );
  }
}

public function fetchAll()
{
  return Doctrine_Query::create()
    ->from('Article a')
    ->leftJoin('a.Translation t')
    ->orderby('a.date DESC')
    ->useQueryCache()->useResultCache()
    ->execute();
}