NodeJS + Axios instance + Cached between requests - node.js

Question

Current setup is VueJS + SSR, but any React JS solutions probably work too.
I have a file called axios.js in which I create a new axios instance and set the apropiate Authorization headers.
import axios from 'axios'
axios.interceptors.request.use((config) => {
config.foo = 123;
});
const instance = axios.create();
instance.verylongunexistingattribute = new Date().toUTCString()
instance.interceptors.request.use((config) => {
config.foo = 456;
});
axios.get('/foo'); // config.foo === 123 -> true
instance.get('/foo'); // config.foo === 456 -> true
export { instance, createInstance, initializeApiV2 }
Seems fine to me, then in my file where I do the AJAX requests I simply do:
import axios from '#/src/api/axios'
let fetchUserProperties = () => {
console.log("axios:instance", axios.verylongunexistingattribute)
console.log("axios:instance.request", new Date().toUTCString())
return new Promise((resolve, reject) => {
axios.get(`/profile/properties`)
.then((result) => {
resolve(result.data)
})
.catch((error) => {
reject(error)
})
});
}
Just to remember, this works perfect in the browser, but fails miserably on node.
Why does it fail: enter link description here
Basically, the instance created in axios.js is being cached by node, so that following request made by diferent users end up using the same instance. And if a requestInterceptor with the token has already been defined then it might show other users data :(
I can't get my head around it, as I can't just return a function which creates a new instance of axios everytime it is called.
How can I create an axios instance which will only live for 1 request?
I tried to explain it as best as I could, if you need more info just ask.