I think multiple Choice Fields should not be selected by default when editing the posts. Or, at least, they should be deselected if they are Required, so they can throw an alert if not selected.

For instance, a "Button Group" has already one option selected by default when editing the Post.

If a user is distracted, the wrong option can be submited. More so because there is no warning of "Required field empty", although Required in Validation is active.

Thanks