Yes you are right.
If I set the shortcode in the page content for a single page (like this: https://ihrschulranzen.de/schulranzenberatung/ ) it works like a charm.
If I set the shortcode inside a Site-Template (or directly onto the front page) inside the builder then it prints the p and br tags again inside the displayed element.
But how can I get it to work on my frontpage and my other site-templates (so i can use it inside the menu-header) ? Maybe if I put the shortcode inside “a page-content” and this page content is then displayed with another shortcode inside my page-templates?