I set up the main menu in that way that it has to load menu-items of first and second level.
In the backend, i also have menu-items of third level. But I don't want to show them in frontend.
Still, the menu items of the third level appear for a few seconds and I can even click on them. Only after that do they disappear forever.
But it is absolutely not the intention that these are ever to be seen, they should only be accessible via links in the site itself.
How can I avoid it that they appear by loading te site?