Profiler re-reads mails between requests

[Jean85]

Case: a test on a controller that sends a mail, then redirects
Expected: if I count mail sent, I get 1
Bug: the mail is counted twice, once per client navigation, and I get 2

class ControllerTest extends ParaunitFunctionalTestCase
{
    public function testMail()
    {
        $client = static::getAuthorizedClient();
        $client->enableProfiler();
        $client->followRedirects();
        $crawler = $client->request('GET','notification/1');

        $button = $crawler->selectButton('notification[sendButton]');
        $form = $button->form();
        $client->submit($form);

        $mailCollector = $client->getProfile()->getCollector('swiftmailer');

        // Redirect followed!!
        $this->assertEquals(200, $client->getResponse()->getStatusCode());
        // this fails!
        $this->assertEquals(1, $mailCollector->getMessageCount());
    }
}

For now, a possible workaround could be not following the redirect, checking the mail count before following the redirect o rebooting the kernel with the client. But this needs to be fixed.