Why doesn't cookie work in Phalcon 3.1.2?

Question

Phalcon

I can't send cookies to the user, I can't understand why
I create an i18n object, which I register in the allocator.

$di->setShared('i18n', function() use ($di) {
    $dispatcher = $di->getShared('dispatcher');
    $cookies = $di->getShared('cookies');

    $i18n_config = require_once __CONFIGSDIR__ . '/i18n.php';
    $i18n = new I18n($i18n_config, $dispatcher, $cookies);
    return $i18n;
  });

When an object constructor is called, a cookie with the language is set, but it is not set ... funny. If you request it via ->cookies->get()->getValue() - it is. But it's not in the browser. I mean - it's in PHP but not in reponse headers. If you put $this->cookies->send() - the cookie appears, but the i18n module is not the place to start displaying headers to the user.
I tried to put it before $response->send() in the bootstrap file - all the same, cookies do not reach the browser.
I seem to be misunderstanding DI in phalcon, can someone explain?