Caldera Forms conflict

Hello,

I use a contact form of Caldera forms on a Divi popup and directly on a page.
When used on the popup, the phone number field is not blocked. I mean, on a normal post, you can just give 10 numbers. On the popup its totally free. There is no limit.

Do you have any solution?

For triggering the popup, you have to click on the blue button at the right of the sticky header.

Regards.

The page I need help with: [log in to see the link]