I have a GameScene called from the body of a SwiftUI view. In iOS 15, everything works perfectly. However, in earlier versions of iOS, it does not work. Specifically, as print statements indicate, didMove(toView: SKView) is being called twice. This causes a "start" button reappear and the desired game actions to run invisibly in the background. Below is the SwiftUI view that contains the SpriteView().
I think the issue is being caused by calls to the viewModel in the game scene which are used to update the SwiftUI view in which the SpriteView() appears. Is there a way to circumvent this? I suspect there is, because it works in iOS 15 (but not earlier versions). Please let me know if I have gone about this all wrong. Thanks!

struct NyonindoChallengeView: View {
    @ObservedObject var viewModel = NyonindoChallengeViewModel()
    var gameScene: SKScene {
        let scene = NyonindoGameScene(
            size: CGSize(
                width: UIScreen.main.bounds.width,
                height: UIScreen.main.bounds.height
            ),
            attempts: viewModel.attempts
        )
        scene.viewModel = self.viewModel
        scene.scaleMode = .aspectFill
        return scene
        }

    var endScene: SKScene {
        let scene = NyonindoSummaryScene(size: CGSize(
                                            width: UIScreen.main.bounds.width,
                                            height: UIScreen.main.bounds.height
            )
        )
        scene.viewModel = self.viewModel
        scene.scaleMode = .aspectFill
        return scene
        }

var body: some View {
    ZStack {
        GeometryReader { geometry in
            if viewModel.gameOver {
                SpriteView(scene: endScene,
                           transition: .crossFade(
                            withDuration: 1.0
                           )
                )
                    .frame(
                        width: geometry.size.width,
                        height: geometry.size.height
                    )
            } else {
                SpriteView(scene: gameScene,
                           transition: .crossFade(
                            withDuration: 1.0
                           )
                )
                    .frame(
                        width: geometry.size.width,
                        height: geometry.size.height
                    )
                }
        }
        .edgesIgnoringSafeArea(.all)
        .navigationBarTitle(Text(""))
        .navigationBarHidden(true)
        .statusBar(hidden: true)
        VStack {
            HStack {
                Text(viewModel.gameActive ? "Round \(viewModel.attempts + 1) of 3" : "")
                    .font(.subheadline)
                    .bold()
                    .padding()
                Spacer()
                Text("Try to beat \(viewModel.highestScore)")
                    .font(.subheadline)
                    .bold()
                    .foregroundColor(.black)
                    .padding()
            }
            Spacer()
        }
        .edgesIgnoringSafeArea([.top])

            if viewModel.gameOver {
                let earnedPoints = viewModel.highestScore
                let points = min(nyonindoChallenge.maxPoints, earnedPoints)
                ChallengeFeedbackView(challenge: nyonindoChallenge, points: points, success: true, text: "Well done!")
            }
        }
    }
}