Here are the 3 scenarios:
Not behind the paywall at all:
Behind the paywall, but not assigned to any categories:
Behind the paywall, successfully assigned to categories:
The problem occurs when you edit (and republish) a story. Effectively, you go from the 3rd or 2nd scenario to the 1st scenario until you manually “re-enable” eligibility from a desktop computer. These are screenshots from the “Stats” view on iOS. For me, this has happened 100% of the time since the latest distribution update.