Adding view hierarchy in SwiftUI seems to break combine behaviour...

Apologies for a somewhat complex code snippet, I tried to strip away as many red herrings as possible.
Expected Behaviour:

• tap red circle

• it animates to green

• status text updates

• circle returns to red

Actual behaviour:

• tap red circle

• it animates to green

• status text updates

• circle does NOT return to red

I can fix the circle behaviour by removing the @Published modifier from the status property.
I can also fix the circle behaviour by copying everything from ExtractedView and implementing it in ContentView.

Am I doing something wrong? or is there something I can do differently to make my code work? (I would prefer to not copy everything from extractedView into contentView as my app requires n ExtractedViews and I'd rather not duplicate that code.

thanks in advance,
Mike

Code Block 
class SubModel: ObservableObject {
    @Published var isActing: Bool = false
    func startActing() {
        isActing = true
    }
}
class Model: ObservableObject {
    @Published var status: Int = 0
//    var status: Int = 0
    let leftModel = SubModel()
    func startActingLeft() {
        leftModel.startActing()
        status += 3
    }
}
struct ContentView: View {
    @ObservedObject var model: Model = Model()
    var body: some View {
        VStack {
            ExtractedView(model: model.leftModel)
                .onTapGesture {
                    self.model.startActingLeft()
            }
            Text(String(model.status))
        }
    }
}
struct ExtractedView: View {
    var model: SubModel
    @State var fillColor = Color.red
    private var actSubject = PassthroughSubject<Void, Never>()
    private var afterAct: AnyPublisher<Void, Never>
    init(model: SubModel) {
        self.model = model
        self.afterAct = actSubject
            .debounce(for: .milliseconds(1100), scheduler: DispatchQueue.main)
            .eraseToAnyPublisher()
    }
    var body: some View {
        ZStack {
            Circle()
                .fill(fillColor)
                .frame(width: 150, height: 150)
        }
        .onReceive(model.$isActing, perform: {
            if $0 {
                withAnimation(Animation.easeInOut(duration: 0.8), {
                    self.fillColor = Color.green
                })
                self.actSubject.send()
            } else {
                self.fillColor = Color.red
            }
        })
        .onReceive(afterAct) {
            self.model.isActing = false
        }
    }
}