J3.x:Known issues with the new URL Routing parameter
From Joomla! Documentation
In Joomla! 3.7.0 there's the parameter to activate the new URL Router (Modern Routing).
To activate it for contents you need to access the Options of Article Manager, in the TAB Integration, and enable the "URL Routing" parameter. There are, however, currently known problems with this parameter activated
Errors reported
- The URLs of single articles do not work if there is not a menu item related to these items.Issue: https://github.com/joomla/joomla-cms/issues/13133
- The 404 error page is no longer displayed in the case of non-existing URLs, but in these cases the homepage is opened. Here the opened tracker waiting for a solution: https://issues.joomla.org/tracker/joomla-cms/12822
Versions affected
General Information
This pertains only to Joomla! version(s): 3.7.0
What is the cause
How to fix
opened tracker waiting for a solution: https://issues.joomla.org/tracker/joomla-cms/12822