I just spent some time creating a form, and while brushing over the final details, I tried activating the email field "Collect email addresses in settings -> general"
Then I deactivated it and now there's an invisible Required field I can't remove. It doesn't stop me from progressing, but it's annoying.
I can confirm it's the email setting because I tried to recreate the form from scratch. Everything works fine, then activate e-mail collection, then deactivate it. And bam, it's there.
Has anyone noticed?