vishra2001 wrote:... the Top navigation, Menu proxy, and breadcrumb proxy of the HTML5 output would intermittently stop loading as I navigate through the output. "You are here" text displays, but the breadcrumbs text does not.
By "intermittently stop loading," I take it you mean that, as you navigate from topic to topic, some topics don't show the navigation items at all, rather than those specific topics sometimes show the navigation items and sometimes don't.
What you describe are sure signs that a topic without the navigation items means that that topic is not present on the TOC. That's where I'd start with my troubleshooting.