View refreshing not triggered when ObservableObject is inherited in SwiftUI

Question

ContentView2 view is not refreshed when model.value changes, if Model conforms to ObservableObject directly instead of in

Answer 1

This really looks like heavy defect.

class SuperModel: ObservableObject {
}

class Model: SuperModel {
    @Published var value = ""
}

as I see the value is changed and keep new one as expected, but DynamicProperty feature does not work

The following variant works for me (Xcode 11.2 / iOS 13.2)

class SuperModel: ObservableObject {
    @Published private var stub = "" // << required !!!
}

class Model: SuperModel {
    @Published var value = "" {
        willSet { self.objectWillChange.send() } // < works only if above
    }
}

Also such case is possible for consideration:

class SuperModel {
}

class Model: SuperModel, ObservableObject {
    @Published var value = ""
}