I've encountered a bug in the Advanced Custom Module (JA ACM) (Features Intro - style 3) where it throws a 404 'article not found' error when a URL menu type is selected as the feature link.
The URL is an internal menu URL with an anchor. When the feature menu is accessed from the front end, the module produces an incomplete URL for the specific menu ID, not the full URL of the menu item linked.
For example:
Full URL linked in menu item: index.php?option=com_content&view=article&id=381&Itemid=318&lang=fi#a-j
ACM delivered URL: index.php?Itemid=319&lang=fi (319 being the ID for URL menu item above)
I've tried with external URLs and the same result is produced.
It is worth noting that Feature Intro - style 2 correctly delivers the same URL when entered as the feature link. However, it isn't possible to give a URL in style 3. A specific menu has to be selected.