From what I can tell it simply appears that you have no text saved to your slogan element.
Maybe sort of an obvious question, but are you sure you’ve actually saved text into your slogan element? Is it possible you’re getting layouts mixed up? Is it possible you’re trying to put HTML that isn’t allowed into the slogan text that’s getting stripped out and thus nothing is saved there?
I’d do a little more troubleshooting with what you’re actually doing in the Layout Builder. I’m not able to see what you’re doing other than the fact that your slogan has no text in it. 😉