Bug with mobile theme in combination with Anarcho notepad

Hi,
on my website klaos.de I’m using the Page Builder plugin in combination with the theme “Anarcho Notepad”. When I visit the website on a mobile device (or I zoom in with ctrl+ on a desktop), the site looks really buggy, because the first row (and always only the first, doesn’t matter which I put there) is really squished.
Other rows are looking fine.
Responsive layout is disabled, row is set to no collapse.
Can you help me?

EDIT: Also, most of the links on the right aren’t clickable, when I use Page Builder (e.g. Archive, “Kategorien” (Categories), Meta)

EDIT2: Please help me with this issue! I think it’s not very difficult to debug, because you can just install the theme from wordpress. And if this theme has this problem, probably there will be other themes having the same problem.

As far as I understood, it has something to do with the Red Date Ribbons on the site.