How to use the application object created from Codeception in complex acceptance testing?

Question

Yii

Hello. The question is this. Started writing acceptance tests for Yii2 applications.
Came across the following:

public function landToFirstEnterApplication(AcceptanceTester $I)
    {
        /** @var UrlManager $urlManager */
        $urlManager = Yii::$app->get('frontendUrlManager');

        $I->amOnUrl($urlManager->getHostInfo());
        $I->see('Авторизация');

        $I->click('Зарегистрироваться');
        $I->see('Зарегистрироваться');
        $I->fillField(['id' => 'emailform-email'], $userEmail = '[email protected]');
        $I->click('Продолжить');
        $I->waitForText('Вернуться на главную страницу', 2);

        $I->seeEmailIsSent(1);
        /** @var Message $mail */
        $mail = $I->grabLastSentEmail();
        expect($mail->getTo())->hasKey($userEmail);

        $link = $this->getLink($mail->getSwiftMessage()->getChildren()[0]->getBody());
        $I->amOnUrl($link);
        $I->see('Установить пароль');

    }

The test crashes on $I->seeEmailIsSent(1);
This happens because the current instance of Yii::$app created inside the test uses a test stub from Codeception, which puts all letters to itself in a private array.
Then the seeEmailIsSent method and everything next to it works with this array.
And $I itself now uses an application object, simply created from a test config, in which mailer is not replaced by a class from Codeception.
Actually, the question is: how to write a test in such a way that Yii::$app from the test is used, and not created upon request?

acceptance.suite.yml

actor: AcceptanceTester
modules:
enabled:
- WebDriver:
url: 127.0.0.1:44444
browser: chrome
- Yii2:
configFile: 'common/config/test-local.php'
part:
- email
- ORM
- Fixtures
- init
cleanup: false
transaction: false
recreateApplication: true