I had a look and here is the deal: What you see there is the page title. In Drupal 8 the page title is a block (in D7 it wasn’t), meaning that you can choose in which pages you want it to be present like a normal block.
By default, it is not present in Landing Pages, as in Landing Pages you can add your title in many different ways. I checked your configuration and for some reason the Page Title block is enabled in all Content Types, including Landing Page.
What I suggest is to exclude Landing Pages from showing titles and the title will be removed. If you want to have titles in your Landing Page, there are different other ways (Hero Frame, Text Component etc).
Hope that helps. Let me know if you need something else.