Same issue ? Tried both the current and the TestFlight version (4.3.1 and 4.4 beta) , playground works but app doesn’t.

Interesting! not sure why I didn't try this 🙃

Looks like an @Model must be inserted into the context before use in SwiftUI actor PreviewSampleData { @MainActor static var container: ModelContainer = { let schema = Schema([Trip.self, BucketListItem.self, LivingAccommodation.self]) let configuration = ModelConfiguration(inMemory: true) let container = try! ModelContainer(for: schema, configurations: [configuration]) let sampleData: [any PersistentModel] = [ Trip.preview, BucketListItem.preview, LivingAccommodation.preview ] sampleData.forEach { container.mainContext.insert($0) } return container }() @MainActor static var previewTrip: Trip = { let container = PreviewSampleData.container let trip = Trip.preview container.mainContext.insert(trip) return trip }() } #Preview { MainActor.assumeIsolated { List { TripListItem(trip: PreviewSampleData.previewTrip) } .modelContainer(PreviewSampleData.container) } }

Unfortunately this is not possible in Xcode cloud since they seem to not have the earlier beta available :( Completely broke my process

I have attempted to do this from both the web and directly in Xcode.

Huge benefits I think depending on what the price is though. Being able to offload your builds is great and even if you are a solo developer you have users I am assuming that will test your app.

Anyone know of a work around for this?

Fixed in 12.2, but does that mean it will be fixed for iOS 13?