Error 503, PHP

[Kemel91]

For some reason, error 503 appears periodically, and after that it does not go away until the next restart of the container, what could be the problem? Logs:

2024/06/13 04:30:52 [info] 434#434 "laravel" application started
free(): invalid pointer
2024/06/13 04:30:52 [alert] 84#84 app process 412 exited on signal 6
munmap_chunk(): invalid pointer
2024/06/13 04:30:52 [alert] 84#84 app process 427 exited on signal 6
free(): invalid pointer
2024/06/13 04:30:52 [alert] 84#84 app process 370 exited on signal 6
2024/06/13 04:30:54 [info] 438#438 "laravel" application started
free(): invalid pointer
2024/06/13 04:30:55 [alert] 84#84 app process 414 exited on signal 6
2024/06/13 04:30:57 [info] 440#440 "laravel" application started
2024/06/13 04:30:57 [info] 441#441 "laravel" application started
2024/06/13 04:30:57 [alert] 84#84 app process 432 exited on signal 11
2024/06/13 04:30:57 [info] 442#442 "laravel" application started
2024/06/13 04:30:57 [alert] 84#84 app process 406 exited on signal 11
2024/06/13 04:30:57 [alert] 84#84 app process 438 exited on signal 11
2024/06/13 04:31:27 [info] 443#443 "laravel" application started
2024/06/13 04:31:27 [alert] 84#84 app process 426 exited on signal 11

There is more than 100 GB of free RAM on the server, there are no restrictions in the container. Unit config:

{
  "listeners": {
    "*:8082": {
      "pass": "routes"
    }
  },

  "routes": [
    {
      "match": {
        "uri": "!/index.php"
      },
      "action": {
        "share": "/var/www/html/public$uri",
        "fallback": {
          "pass": "applications/laravel"
        }
      }
    }
  ],

  "applications": {
    "laravel": {
      "type": "php",
      "root": "/var/www/html/public/",
      "script": "index.php",
      "processes": {
        "max": 500,
        "spare": 20,
        "idle_timeout": 20
      }
    }
  }
}

PHP 8.3 unit version: 1.32.1 PHP ini memory limit increased to 10 GB.