How to clone a form with pictures without contacting the server?

Question

JavaScript

There is a captcha form. There is a validation script in which this form is cloned by the clone() method. When cloning the form, a request is made to the server for the captcha image and the code changes in the session. This happens in Chrome, which is included in the distribution of OpenServer, in other browsers this does not happen and the captcha does not change.
How to make sure that the captcha image is not cloned or there is no access to the server during cloning.