Thanks for the info, I actually have switched back to using the form directly from the MailChimp for WordPress plugin, rather than Contact Form 7.
Second question, if you don’t mind…
Is there a way to add Google reCAPTCHA to the form? I did not see any option for that on the form. I have tried the CAPTCHA plugin add-on as suggested in the documentation, but I prefer to use reCAPTCHA