Added fields to quiz result form. Now I cant get past quiz form to start questions

I added fields to my quiz result at /admin/quiz/quiz-result-types/manage/quiz_result/form-display.

Now when I go to /quiz/1/take I see the fields instead of Question 1. This is great!

However, after filling out the fields and hitting the submit button, I'm redirected back to the form.
A new QuizResult entity was created with the form data saved, but no questions answered.

I'm thinking its the QuizController::take() function that is buggy.

if ($build_on_last || (is_a($field, FieldConfig::class) && $field->getThirdPartySetting('quiz', 'show_field'))) {
            // We found a field to be filled out.
            $redirect_url = Url::fromRoute('entity.quiz.take', ['quiz' => $quiz_result->getQuiz()->id()]);
            $form = \Drupal::service('entity.form_builder')->getForm($quiz_result, 'default', ['redirect' => $redirect_url]);
            return $form;
          }