Socket.io prepends '/#' to server ids

[FabioAntunes]

I'm having a weird issue, I have just cloned a repo that was working perfectly fine, but for no aparent reason it isn't anymore.

Basically what's happening is that my socket.io server instance is prepending '/#' to the ids making them different from the client side.

So on the server side I have /#zG3wncZxZvgRE7LKAAAA and on the client side I have zG3wncZxZvgRE7LKAAAA

Also when the client is receiving a message, it's possible to see on the frames tab this:

4undefined

This is my app.js and config.room = fabio1:

    import config from './config';
    import io from './factories/io';

    io.on('connection', (socket) => {
      socket.join('dmClient');
      socket.join(config.room);
      console.log('socketId', socket.id);
    });

And this is my /factories/io.js

    import socketIo from 'socket.io';
    const io = socketIo(3000);

    export default io;

More info:

• socket.io - 1.4.5
• node - v4.4.0

[creole]

See #2475 and #2405