TypeError: Cannot read properties of undefined (reading 'headers_len')
    at /usr/local/lib/node_modules/unit-http/http_server.js:157:13
    at Array.forEach (<anonymous>)
    at ServerResponse._removeHeader (/usr/local/lib/node_modules/unit-http/http_server.js:156:15)
    at ServerResponse.setHeader (/usr/local/lib/node_modules/unit-http/http_server.js:89:14)
    at ServerResponse.header (/app/node_modules/express/lib/response.js:684:10)
    at ServerResponse.append (/app/node_modules/express/lib/response.js:645:15)
    at res.cookie (/app/node_modules/express/lib/response.js:777:8)
    at file:///app/index.mjs:7:9
    at Layer.handleRequest (/app/node_modules/router/lib/layer.js:152:17)
    at next (/app/node_modules/router/lib/route.js:157:13)

import express from 'express'
const app = express();

app.get('/', (req, res) => {
    res.cookie('first', 'cookie', { maxAge: 900000, httpOnly: true })
    res.cookie('second', 'cookie', { maxAge: 900000, httpOnly: true })
    res.cookie('third', 'cookie', { maxAge: 900000, httpOnly: true })
    // ^^^^^ error appears here
    res.send('Hello, Express on Unit!')
})

app.listen(8080, () => {
    console.log(`Node server is listening on port 8080!`);
});

{
  "listeners": {
    "*:8080": {
      "pass": "applications/ssr"
    }
  },
  "applications": {
    "ssr": {
      "type": "external",
      "processes": {
        "max": 50,
        "spare": 1
      },
      "working_directory": "/app",
      "executable": "/usr/bin/env",
      "environment": {
        "version": "{{ '%Y-%m-%d_%H:%M:%S' | strftime }}"
      },
      "arguments": [
        "node",
        "--loader",
        "unit-http/loader.mjs",
        "--require",
        "unit-http/loader",
        "./index.mjs"
      ]
    }
  },
  "access_log": {
    "path": "/dev/stdout",
    "format": "$remote_addr - - [$time_local] \"$request_line\" $status $body_bytes_sent \"$header_referer\" \"$header_user_agent\""
  }
}

{
  "name": "ngnixUnitBug",
  "version": "1.0.0",
  "description": "",
  "main": "index.mjs",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "private": true,
  "dependencies": {
    "express": "^5.1.0"
  }
}

services:
  ssr:
    image: unit:node20
    container_name: bug_ssr
    working_dir: /app
    ports:
      - 8081:8080
    volumes:
      - ./index.mjs:/app/index.mjs
      - ./node_modules:/app/node_modules
      - ./config.json:/docker-entrypoint.d/config.json
    entrypoint: >
      /bin/sh -c "
      npm link unit-http && \
          chown -R unit:unit /run && \
          chown -R unit:unit /var/lib/unit && \
          chown -R unit:unit /app
      /usr/local/bin/docker-entrypoint.sh unitd --no-daemon --control unix:/var/run/control.unit.sock
      "