EDIT: Solved by Squarespace customer support. It looks like the title line height is the culprit here. Under Design > Site styles, scroll all the way to the bottom to Blog: Typography & Colors. Click the List Title Font and make sure the line height is above 0.8em.
Original post:This looks like a possible solution to my similar problem, but I can't figure it out. There is ugly white space cutting into the text of my blog post title. See here https://www.fuhrmanclinic.com/new-blog. The attached screenshot shows my editor view. I see no way to remove this thing called "Intro." How do I get rid of the white space so it doesn't cut into the blog post title text? Thank you.