@Observable crashes in Xcode, iOS Beta 7 on iPad

If you update the code using @Observable, it works normally on macOS, but an error occurs on iPad.

Simultaneous accesses to 0x60000300c9a0, but modification requires exclusive access.

The first time I select it from the list, it works fine, but the second time I select it, an error occurs.

original source code

struct ContentView: View {
    
    @StateObject private var envProfile = ProfileEnvironment()
    
    var body: some View {
        NavigationSplitView {
            List(selection: $envProfile.selection) {
                NavigationLink("One", value: "1")
                NavigationLink("Two", value: "2")
            }
        } detail: {
            Text(envProfile.selection ?? "nil")
        }
    }
}

class ProfileEnvironment: ObservableObject {
    @Published var selection : String?
}

Updated code using @Observable

struct ContentView: View {
    
    @State private var envProfile = ProfileEnvironment()
    
    var body: some View {
        NavigationSplitView {
            List(selection: $envProfile.selection) {
                NavigationLink("One", value: "1")
                NavigationLink("Two", value: "2")
            }
        } detail: {
            Text(envProfile.selection ?? "nil")
        }
    }
}

@Observable
class ProfileEnvironment {
    var selection : String?
}