Validator Issue required Fields aren’t threated

The validator confused me.
In your documentation you say that something like Cc: [email] is possible.
The field has to be required.
This makes senses, because the value have not to be empty.
But if that is set, your Validator means there is an issue, regardless if I use the “To” -inputfield or the additional headers inputfield.
So for me this is a bug.
Actually I have disabled it because I don’t want to answer questions coming from our customer about it.