I saw that there's already a post regarding a bug in conditional visibility but this appears to be a separate issue. I have a div block set to display when an option field is turned on, but the page displays completely empty when the condition ISN'T met, and displays without the selected element when the condition IS met.
I'm using this for "related posts" on blog posts, and when there aren't related posts (when the option is set to "No") the page displays without any content and without any styling, including meta tags. When there are related posts (when the option is set to "Yes") the element isn't visible at all. I've included screenshots of each scenario in the designer and after publishing.
When condition is met
When condition isn't met