NSHostingSceneRepresentation doesn't show Window(_:id:) and UtilityWindow(_:id:) with .openWIndow(id:)

NSHostingSceneRepresentation, introduced in macOS 26, allows calling SwiftUI’s windows and other elements set in a Scene from AppKit. However, while Settings and WindowGroup set in the Scene can be invoked as expected using environment.openSettings() and environment.openWindow(id:) respectively, calling Window or WindowUtility doesn’t work. That is, the app just fails to open the desired window with the provided ID, and no error message or other feedback/crash/freeze appears.

I expect that executing the openUtilityWindow(_:)action in the following code will display the UtilityWindow set in the scene. However, the window does not actually open.

@main
final class AppDelegate: NSObject, NSApplicationDelegate {

    private let scene = NSHostingSceneRepresentation {
        UtilityWindow("Utility Window", id: "UtilityWindow") {
            Text("Utility Window")
                .scenePadding()
        }
    }
    
    func applicationWillFinishLaunching(_ notification: Notification) {
        NSApp.addSceneRepresentation(self.scene)
    }
    
    @IBAction func openUtilityWindow(_ sender: Any?) {
        self.scene.environment.openWindow(id: "UtilityWindow")
    }
}

Is there something wrong with my implementation and expectation? Or is this a bug in NSHostingSceneRepresentation?

Just in case, I’ve already filed this issue withFeedback Assistant: FB20310722

This feedback also includes a sample project reproducing this issue.