Do requests to the VK API hang periodically?

Question

In contact with

Through the VKontakte API I made authorization.
This is the kind of code

$data = [
                'client_id'     => $clientId,
                'redirect_uri'  => route('vkontakte'),
                'client_secret' => $secretKey,
                'code'          => $code,
            ];

            $query = http_build_query($data);

                $ch = curl_init();
                curl_setopt($ch, CURLOPT_URL, 'https://oauth.vk.com/access_token?' . $query);
                curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
                $json = curl_exec($ch);
                curl_close($ch);

Everything worked fine, but recently, periodically, this request in VK began to freeze. And the script is interrupted by a timeout. This happens absolutely randomly, if you run it next, it can work out instantly. What can be wrong?