Zend\From 'break_chain_on_failure' when reCaptcha fails

[cmple]

Hi,
I'm trying to setup a user registration form that prevents email harvesting using reCaptcha,
When the form fails !$form->isValid() it outputs all input errors (e.g. "Email is already in use", "Invalid password", "Incorrect captcha text entered")
I'm not sure how to add an inputFilter on reCaptcha with "break_chain_on_failure" variable,

$recaptcha = new ReCaptcha(array(
        'theme' => 'white',
        'lang' => 'en_US',
        'tabindex' => 3,
        'ssl' => true,
        'xhtml' => true,
        'message' => _('Incorrect captcha text entered'),
));
$recaptcha->setPubkey('*** PUBLIC KEY ***')
                        ->setPrivkey('*** PRIVATE KEY ***');

$captcha = new Element\Captcha('captcha');
$captcha->setCaptcha($recaptcha);
$captcha->setAttribute('label', _('Verify that you\'re human'));
$this->add($captcha);

Thanks,
Roman