[NEXT-1119] Socket.IO Not working anymore from Next.js 13.2.5-canary.27 to latest Next.js 13.4.1

Problem

Verify canary release - [X] I verified that the issue exists in the latest Next.js canary release Provide environment information [code block] Which area(s) of Next.js are affected? (leave empty if unsure) App directory (appDir: true) Link to the code that reproduces this issue https://codesandbox.io/p/sandbox/nextjs-socketio-u89y82?file=%2Fpackage.json&selection=%5B%7B%22endColumn%22%3A1%2C%22endLineNumber%22%3A4%2C%22startColumn%22%3A1%2C%22startLineNumber%22%3A4%7D%5D To Reproduce Agenda of this project? - To setup the Socket.Io server and share the information from one client to another user socket.io events The App is have the following things - - An api for initialising the Socket.Io server - inside /pages/api/socketio - A client page to connect to this server - inside /app/page Whats the Issue? - There has been an unknown error in network connection from client side when its trying to create the Socket.Io connection. Since when this issue is happening? - This has been happening from Next.js version 13.2.5-canary.27 version and its still happening even in latest canary release 13.4.1-canary.2 and also the latest release Next.js 13.4.1 Do we have an Example project? - Yes, I have created a testing project in codesandbox, that I have already shared. (Link) Steps to Reproduce - Just see the console and network tabs for the client connection error. It will happen to all the versions on and above 13.2.5-canary.27 - And to see if its fixed, you need to downgra