for whatever reason https://github.com/dimagi/commcare-hq/blob/master/corehq/couchapps/reports_forms/views/by_app_info/map.js#L68 emits the user registration pinned to every module in the app. this causes N "user registration" options when choosing your form filter in the module, where N is the number of modules in the app. given that user registrations don't have meta blocks anyway, i would imagine the new behavior of never showing them at all is desired