Hi, I'm trying to publish a Shortlist Story Map using an existing Web Map "as is." The application displays fine when I access it via my content page by clicking "view application":

However, when I'm not logged in, the applications behaves erratically. Sometimes the application displays fully. Sometime only some tabs display. Most often the application never finishes initializing:

The web application is public and accessible here. The underlying web map is also public, as is the supporting feature layer, whose definition is here.
I'll also note:
- The feature layer includes all required fields, but also includes other fields. I'm wondering if extra fields can cause errors.
- Using the same web map and feature layer, the import workflow works fine. The resulting app can be accessed here.
Thanks for your help!