Thanks for writing in! I have logged in to your site and I can confirm that the issue exist. This is a known issue being caused by the
<hr> tag added to the headline text.
Once you remove the
<hr> tag, the headline will appear in the preview. You can always use the skeleton mode when editing for faster response and easy access of all the elements in the preview area. This is also helpful especially if one of the sections or elements is not visible or hidden in selected screen size or you may have applied visibility options to a section of element.
You may remove the
<hr> tag if you want to get rid of the line right below the headlines.
Hope this helps.