Hello,
I have the same problem on all my customers sites which are under Joomla 4 and all with the last version of SP PageBuilder 3.2.8
The page error 404 does not work, we can write what we want after the domain in the url, we always remain on the home page after 2 / in the url
For example : Root domain : https://kawuk.com
https://kawuk.com/test go to 404
https://kawuk.com/test/test1 go to home page
https://kawuk.com/test/test1/test2 goto home page
https://kawuk.com/test/test1/test2/blablabla.222 goto home page
I have manually set redirects in the redirect manager to a 301 redirect and the problem remains the same. The bad or non-existent urls are not redirected to the 404 page.
Best regards, Lionel