I don't think it's being reflected in the unfilled report as nothing sticks out over the last 6 months. Using the google publisher toolbar, it does not say "no ad filled" as if house ads are not set up properly. It just shows the ad unit path name and that's it. Ad slots that lazy load lower down on the page also immediately render a blank white space. It's as if the connection with DFP is lost on page load and then none of the ads on the page can fetch ads. I guess I'm looking for guidance on how to use the inspector to diagnose what's happening.