The issue described here was solved #54
The problem was that empty cookie and arguments were provided to each of endpoint. In this pull request, all the connection info cookies and arguments are provided to all endpoints.
Cookie endpoint issue solved
Cookie endpoint issue was solved
thanks for this fix. issue as you know was with both cookies and url parameters.
This will make all "child" connections use whatever was passed to the main connection. Looks like it is only available option - socket.io devs won't fix client to pass query string data in child connections.