I think this is because someone in the core decided that the Page "Title" property should be mandatory. I noticed after installing 4.4+ that when I attempted to leave the Title property blank when creating a new page (because this lets DNN use the page's Tab Name property to set up Bread crumbs...) it was automatically defaulted/filled in to the value entered into the Page name property.

I think this is a case of the developer in question not understanding or using the DotNetNuke breadcrumb feature, and another issue of someone thinking they were fixing something when in actuality they were breaking existing functionality, like in the case of the redirect to root URL problem I posted in this forum a while back.

Disclaimer: I take no responsibility or warranty for the following, but it worked for me:

Delete the 'Title' entry in the Tabs table in the database for those pages you wish to have breadcrumbs, and the old bread crumbs will appear in the page title in the explorer. One reason I like this so much is because whatever page someone is on, when they add that page to their favorites, that page gets added in it's proper hierarchy.

It would be nice if someone would unrequire and more importantly un-default this value as it is very very very very very annoying to not be able to leave this field blank.

Finally resolved my issue.  The reason I wasn't seeing the entire path was because all the pages I was navigating to were at the same page level.  Once I assigned the appropriated Parent/Children pages in the Admin--> Pages  section, they all started working.  I should have checked that right away.  Hopefully this will save someone else the frustration of trying to find an answer.