No insight but just to say I’m seeing the same. My app has been live for sometime and I’ve not pushed any updates for quite a while but suddenly my error logs are filled with “OTHER” errors.

Thanks @claude31 for the suggestion - but it feels like that could be even more complicated than just referencing the ids. In answer to your questions: The code example shown above is massively simplified - in practice the Building struct is much more complex. The Address objects are stored in an array which belongs to a custom class. That class is an ObservableObject and is being used as an EnvironmentObject. Yes, the Address and Building objects both get displayed in separate Lists. The name of a Building is edited in a SwiftUI view, and can be edited using a TextField.