What is the timeout period for reCAPTCHA v2 for inactivity?

I have a form and that uses Google reCaptcha V2. There is a delay , which is more than a minute caused by the backend API call. While waiting for the response from server, reCAPTCHA is showing that it is expired. I thought that the expiration timing is 2 minutes, but it is explicitly specified as two minutes for V3. What is the expiration time for V2 and how can I fix this issue ?

I am using the VueJs plugin for reCaptcha. called vue-recaptcha. Please find the code below:

<vue-recaptcha ref="recaptcha" @verify="onVerify" @expired="onExpired" :sitekey="recaptchaSiteKey"></vue-recaptcha>
<input name="recaptchaResponse" v-model="recaptchaResponse" v-validate="'required'" type="hidden" ></input>

Now the onExpired method is like the following:

onExpired: function () {
  this.recaptchaResponse = null
},