Mongo calls the socks create connection more than once, ensure all sockets are closed.
Biggest issue was actually that the mongo client creates an initial socket and passes it to the socks client. I was creating a new socket which replaced the reference to the original socket, which then would timeout for 2 mins on exit of node app.

• Individually close sockets
• Reuse originally created socket in proxy
• Fixed workflows for auth on NPM

Test here