I'm not even sure if this can be considered a bug and I'm not sure how to solve it, but it's odd and I want you to know, in case you don't yet:

For Email, 4.0 allows specifying multiple addresses – One per form line. If you later decide to change the type to Script, the contenct of these multiple lines seemingly is concatenated together, like [email protected]@example.com. That looks a bit odd.