Not compatible with Contact Form 7

Hi!
When I have W3 Total Cache activated, the spinning arrow of Contact Form 7 keeps indefinitely spinning: the form is delivered but the user doesn’t know it’s been sent.

When I deactivate W3 Total Cache, the form works fine again.
I tried not caching the page, and it didn’t work. But I’m a newbie, so I might not have done it correctly. Here is what I did:

Performance > Page Cache > Advanced > Never cache the following pages:
contact-form

(the page url is https://www.foreverbarcelona.com/contact-form.htm)

Any ideas how to solve that? Thank you so much in advance!

https://www.ads-software.com/extend/plugins/w3-total-cache/