PersistedContent downloads and Intents in Fenix 5X?

Do the Fenix 5 models, especially the 5X, support PersistedContent route/course downloads and Intents? On the simulator the methods appear to be present in the classes, but when I try to download a route (using code that works on the Edge and Oregon/Rino), neither :responseType => Comm.HTTP_RESPONSE_CONTENT_TYPE_FIT nor Comm.HTTP_RESPONSE_CONTENT_TYPE_GPX appear to be working.