The problem is not that the redirection is pointed to the front page. That is fine.
The problem is that pages get redirected, that shouldn’t! All public pages were redirected …
But i hopefully found the issue in another level which is synchronized with “logged_in”. There were suddenly a new “empty” access condition group.
I don’t know how it appeared there, i have no screenshot and i can’t recreate it but it was a condition group without!!! a type like “authors” or so …
My original only condition group was and now again is a “pages” condition group.
Since i deleted this “empty” condition everything works fine again and i have no redirects on public pages.
Seems like this “empty” condition matched all pages or so.