How to connect to multiple websocket servers with vue-socket.io-extended

Question

I have 2 servers A and B. Each running on a different port. How do I connect to both servers in Vuejs using vue-socket.io-extended?

What I have tried so far is:

import store from './store'
import VueSocketIOExt from 'vue-socket.io-extended'
import io from 'socket.io-client'

Vue.use(VueSocketIOExt, io('http://localhost:4000'), { store })
Vue.use(VueSocketIOExt, io('http://localhost:5000'), { store })

The above code does connect both instances of our vue-socket.io-extended client to their respective servers, but events and emits only work for the client that was first registered.

The code below is what I have in my VueComponent:

export default {
  ...
  sockets: {
        serverA_event(state){
            // do something ...
        },

        serverB_event(state){
            // do something ..
        }
  },
  ...
}

Note: I would like to use vue-socket.io-extended to do something similar to what is done in the example here with vue-socket.io. I tried using vue-socket.io but for some reason, I couldn't get it to work.