Swift mailer changed setting with default when queue:work

I have a swift mailer in Laravel 5.8 and it send an email with user smtp setting. It works well manually, but when I use this within queue, mailer setting is reverted to default setting. Code is like this.

        if($own_stmp){
            $transport = (new Swift_SmtpTransport($user->mail_host, $user->mail_port))
            ->setUsername($user->mail_username)
            ->setPassword($user->mail_password);
        }else{
            $transport = (new Swift_SmtpTransport(\Config::get('mail.host'), \Config::get('mail.port')))
            ->setUsername(\Config::get('mail.username'))
            ->setPassword(\Config::get('mail.password'));
        }

        // Create the Mailer using your created Transport
        $mailer = new Swift_Mailer($transport);

        // Create a message
        if($own_stmp){
            $message = (new Swift_Message($subject))
            ->setFrom([$user->mail_from_address => $agent->name])
            ->setTo([$lead->email => $lead->name])
            ->setReplyTo($agent->email)
            ->addPart($content, 'text/html');
        } else {
            $message = (new Swift_Message($subject))
            ->setFrom([\Config::get('mail.from.address') => $agent->name])
            ->setTo([$lead->email => $lead->name])
            ->setReplyTo($agent->email)
            ->addPart($content, 'text/html');
        }
        // Send the message
        $result = $mailer->send($message);

As you can see, it changes email setting by $own_smtp flag.

This is really working well, but when I use this with

php artisan queue:work

It is skipped custom user setting and send with default setting.

What is wrong? How to solve this?

via Chebli Mohamed