This looks like a standard situation of only s.tl() call being implemented and not a s.t() call.
Please check the server call and see if all of them have the 'pev' parameter. If yes, then that's an s.tl() call. These calls even if have Page related info, no page related attributes like PageName, Pageviews etc. are recorded as s.tl() is by default considered a link track call and not a page OnLoad call.
If above proves true for your implementation, check your DTM setup and ensure you are using s.t() for PageLoad.