In server logs I get many errors about fetch failed. Absolute vast majority of errors are completely identical and look like following. No info of what it is trying to fetch and from where, stack trace ends before any of my files

TypeError: fetch failed
    at Object.fetch (node:internal/deps/undici/undici:11730:11)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
    cause: ConnectTimeoutError: Connect Timeout Error
        at onConnectTimeout (node:internal/deps/undici/undici:6869:28)
        at node:internal/deps/undici/undici:6825:50
        at Immediate._onImmediate (node:internal/deps/undici/undici:6857:13)
        at process.processImmediate (node:internal/timers:478:21)
        at process.callbackTrampoline (node:internal/async_hooks:130:17) {
        code: 'UND_ERR_CONNECT_TIMEOUT'
      }
  }

And very few (2 occurrences in past 1000 lines of error logs) look like this. I never wrote any socket in this project

TypeError: fetch failed
    at Object.fetch (node:internal/deps/undici/undici:11730:11)
    at async globalThis.fetch (<path to project>/.next/server/chunks/702.js:1:36426)
    at async n (<path to project>/.next/server/chunks/793.js:8:22245)
    at async Promise.all (index 3)
    at async q (<path to project>/.next/server/<path to certain page>/page.js:1:3239) {
    cause: SocketError: other side closed
        at Socket.onSocketEnd (node:internal/deps/undici/undici:8280:26)
        at Socket.emit (node:events:526:35)
        at endReadableNT (node:internal/streams/readable:1589:12)
        at process.processTicksAndRejections (node:internal/process/task_queues:82:21) {
        code: 'UND_ERR_SOCKET',
        socket: {
            localAddress: '::1',
            localPort: 53330,
            remoteAddress: undefined,
            remotePort: undefined,
            remoteFamily: undefined,
            timeout: undefined,
            bytesWritten: 557,
            bytesRead: 713
          }
      }
  }