Laravel reverb pause for 30 second

I have setup laravel reverb in my ubuntu server in production, everything is working as expected, but the problem is reveerb paused for sending event for around 30 seconds after 1 minutes of running, I am using systemd for running reverb, I set the REVERB_APP_ACTIVITY_TIMEOUT to 10 minutes here is my reverb config

 'apps' => [

        'provider' => 'config',

        'apps' => [
            [
                'key' => env('REVERB_APP_KEY'),
                'secret' => env('REVERB_APP_SECRET'),
                'app_id' => env('REVERB_APP_ID'),
                'options' => [
                    'host' => env('REVERB_HOST'),
                    'port' => env('REVERB_PORT', 443),
                    'scheme' => env('REVERB_SCHEME', 'https'),
                    'useTLS' => env('REVERB_SCHEME', 'https') === 'https',
                ],
                'allowed_origins' => ['*'],
                'ping_interval' => env('REVERB_APP_PING_INTERVAL', 30),
                'activity_timeout' => env('REVERB_APP_ACTIVITY_TIMEOUT', 900),
                'max_message_size' => env('REVERB_APP_MAX_MESSAGE_SIZE', 10_000),
            ],
        ],

    ],