Just noticed a small red border around the “email” field when it’s set to “required”. Actually the asterix right to the label is sufficient and the red border disturbing the design and UX rather than helping in my case.
Plus I have noticed that both fields for “Name” and “Email” have different sizes, so the layout is not consistent anymore.
You find the screenshot here:
This is answered on wp-support-forum already, so this is just a feature request …