Getting weird return data from google captcha v2 siteverify API

I have a Vue-Express application which has signup/signin pages.

On both pages, I use the google captcha v2 invisible setting so I manually call the execute function for which I get a valid token

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I then pass this to the express app which calls the google api

https://www.google.com/recaptcha/api/siteverify?secret=<recaptcha_secret_key>&response=<token>

This gives me a response of

The same request if sent via postman gives

{
    "success": false,
    "error-codes": [
        "timeout-or-duplicate"
    ]
}

I am not sure what is wrong here, any help is appreciated.

UPDATE: How I got the token:

I call the onCaptchaVerified when the signin button is clicked and it is called again by the captcha component with the valid token

<vue-recaptcha
  ref="recaptcha"
  size="invisible"
  verify="onCaptchaVerified"
  expired="onCaptchaExpired"
  sitekey="sitekey"
/>

async onCaptchaVerified(token) {
  await this.$refs.recaptcha.execute()
  
  if(!token) {
    return false
  }

  console.log("logging in...", token);

  const res = await postRequest('validate-human', {
    token: token
  )}

  console.log(res.data.data)
}

Duplicate of this post ReCAPTCHA siteverify not returning JSON response

TLDR:

Issue was caused by Axios version 1.2.0 Reverting to 1.1.0 solved the problem.

This might not have occurred if I would have used the fetch API