SwiftUI: view with animation jumps to destination when state changed

RectangleView with TextView slide into screen in 3 seconds, but state of TextView changed after a second while sliding. Now you can see TextView stops sliding, jumps to the destination at once.

I Just want the RectangleView with the TextView as a whole when sliding, and do not change TextView's position whatever it rotates or keeps still when state changed.

GIF dmeo:
https://stackoverflow.com/questions/65795434/swiftui-view-with-animation-jumps-to-destination-when-state-changed

Code Block import SwiftUI
struct RotationEnvironmentKey: EnvironmentKey {
    static let defaultValue: Bool = false
}
extension EnvironmentValues {
    var rotation: Bool {
        get { return self[RotationEnvironmentKey] }
        set { self[RotationEnvironmentKey] = newValue }
    }
}
struct AnimationTestView: View {
    @State private var go = false
    @State private var rotation = false
    var body: some View {
        VStack {
            Button("Go!") {
                go.toggle()
                DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
                    rotation.toggle()
                    print("set rotation = \(rotation)")
                }
            }
            Group {
                if go {
                    RectangleView()
                        .transition(.slide)
                        .environment(\.rotation, rotation)
                }
            }.animation(.easeInOut(duration: 3.0), value: go)
        }.navigationTitle("Animation Test")
    }
}
struct RectangleView: View {
    var body: some View {
        Rectangle()
            .frame(width: 200, height: 100)
            .foregroundColor(.pink)
            .overlay(TextView())
    }
}
struct TextView: View {
    @Environment(\.rotation) var rotation
    @State private var animationRotating: Bool = false
    let animation = Animation.linear(duration: 3.0).repeatForever(autoreverses: false)
    
    var body: some View {
        print("refresh, rotation = \(rotation)"); return
        HStack {
            Spacer()
            if rotation {
                Text("R")
                    .foregroundColor(.blue)
                    .rotationEffect(.degrees(animationRotating ? 360 : 0))
                    .animation(animation, value: animationRotating)
                    .onAppear { animationRotating = true }
                    .onDisappear { animationRotating = false }
            } else {
                Text("S")
            }
        }
    }
}