submit form isn't submitting

[dvdknaap]

In my phpunit test i want to signin a form and then submit but the submit function isn't doing anything.

In my test i go to the login page take a screenshot.
fillin the form and submit and take another screenshot, i see that the form is filled in what i've entered but it's not submitting.

        $client = PantherClient::createFirefoxClient(options: ['capabilities' => ['acceptInsecureCerts' => true]]); 
        $crawler = $client->request('GET', 'https://dockerWebsite/login');

        $this->createScreenshot($client, 'screen.png');

        $loginButton = $crawler->selectButton('Sign in');
        $loginButton->form()->setValues([
         'email' => 'test@test.nl',
         'password' => 'test',
        ]);

        $submitted = $loginButton->submit();

        $this->createScreenshot($client, 'screen2.png');

screen.png

screen2.png

Edit:
when i replace $loginButton->submit() to $client->submit($loginButton->form()); it work so it looks like it's a bug