mailchimp in form - get email from hidden field

There is a certain bug that Elementor needs to change in a really simple way.
After submitting a form, it is possible to send data by Mailchimp, and you need to define where it will get the email address from.
The option at the moment is that it can get an email only from a field defined as email. But this is not true! That can also receive from a field defined as a hidden field.
Elementor should fix it.

(By the way, until Elementor fixes this, maybe someone has a solution on how to set up to receive data from a hidden field?)
Thanks