Why supervisor lost some jobs from queue?

I'am sending Telegram messages with Lumen framework and Telegram bot (messages count is ~ 1400 and it send's via proxy). Each message is a job, which is becomes in the queue. Supervisor get's each job and send messages to users. Job write result data to Lumen log. Some messages get lost and I can't find any information about such messages in log (it seem's such jobs are removed from queue). Why it can happened?

Job code

class ProcessEventSendJob extends Job
{
    protected $data;

    public $tries = 1;
    public $timeout = 30;

    public function __construct($data)
    {
        $this->data = $data;
    }

    public function handle()
    {
        $this->telegram = new Telegram(config('telegram.bot.api_key'), config('telegram.bot.name'));

        TelegramRequest::setClient(new \GuzzleHttp\Client([
            'base_uri' => 'https://api.telegram.org',
            'proxy'    => 'https://proxy_user:proxy_password@proxy_ip:8000',
            'verify'   => false,
            'timeout' =>  30,
        ]));

        ...

        $result = TelegramRequest::sendMessage($data);

        Log::info('Send message', ['result' => $result,]);
    }
}

supervisord.conf

[inet_http_server]
port=127.0.0.1:9001

[supervisord]
logfile=/tmp/supervisord.log ; main log file; default $CWD/supervisord.log
logfile_maxbytes=50MB        ; max main logfile bytes b4 rotation; default 50MB
logfile_backups=10           ; # of main logfile backups; 0 means none, default 10
loglevel=info                ; log level; default info; others: debug,warn,trace
pidfile=/tmp/supervisord.pid ; supervisord pidfile; default supervisord.pid
nodaemon=false               ; start in foreground if true; default false
minfds=1024                  ; min. avail startup file descriptors; default 1024
minprocs=200                 ; min. avail process descriptors;default 200

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface


[supervisorctl]
serverurl=http://127.0.0.1:9001 ; use an http:// url to specify an inet socket

[program:lumen-worker]
command=/usr/bin/php /home/www/salesbox-sb1.ru/artisan queue:work --tries=1
autostart=true              
autorestart=true            
startsecs=10                
startretries=1              
process_name=%(program_name)s_%(process_num)02d 
numprocs=8                  
stopwaitsecs=10             
user=nginx                  
log_stdout=true            
log_stderr=true             
logfile=/var/log/lumen-worker.log

via Chebli Mohamed