Hi
https://www.[redacted].de/wejiwejriwe goes to home page. Why?
It does not "go to home page". Simply there's no error, Joomla does not consider this as a 404.
4SEO error page feature displays a nicer and more efficient error page. But if Joomla does not trigger a 404, there's no much we can do.
(I assume you are not running sh404SEF on that site? sh404SEF would not allow this to happen).
Do you have a category or a menu item for "wejiwejriwe"? this would likely explains Joomla behavior here.
If this is not Joomla, as usual, I would recommend:
- temporarily switching to Joomla Protostar template in case it is your template doing this
- temporarily disable any system plugin that's not from Joomla or from 4SEO
Be sure to clear your browser cache between each attempt.
Best regards
Yannick Gaultier
weeblr.com / @weeblr