ACF Fields issue showing input tags

Hello guys,
I am currently facing some issues in my WordPress system.
I’m creating CTAs in my pages with a combination of Elementor and Advanced Custom Fields.

I have the following issue:
I am inserting a <form> into the Elementor page with the custom HTML widget that is served by an Advanced Custom Fields.
The problem is that somehow in the process all <input> fields are getting removed so that in Elementor only the <form> and <button> tags are showing.

Does anybody have experienced this before and knows a solution?

Thanks a lot!