UIWindowScene sizeRestrictions minimumSize not working on iPadOS

Hello, following Apple docs and guidance from WWDC I'm trying to set a minimum size for my scene, for example I want it to minimally be 3/4 the width and height of the device.

I've removed the UIRequiresFullScreen Info.plist property. The app does run in windowed mode and does have a resizing handle.

I've implemented this UISceneDelegate:

    var window: UIWindow?
    var cameraWindow: UIWindow?
        
    func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
        
        window = UIWindow(windowScene: scene as! UIWindowScene)

        // setup root view controller
        let rootViewController: MainViewController = MainViewController(nibName: "Main", bundle: nil)
        let navController: NavigationController = NavigationController(rootViewController: rootViewController)
        navController.modalPresentationStyle = .fullScreen
        
        // set reasonable minimum sizes for WindowScene
        if let windowScene: UIWindowScene = scene as? UIWindowScene {
            if #available(iOS 16.0, *) {
                let windowSize: CGSize = windowScene.coordinateSpace.bounds.size
                windowScene.sizeRestrictions?.minimumSize.width = windowSize.width * 0.75
                windowScene.sizeRestrictions?.minimumSize.height = windowSize.height * 0.75
            }
        }
        
        window?.rootViewController = navController
        window?.makeKeyAndVisible()
    }

}

And proven via debugger that this code is being executed. I have the following observations:

After setting these minimumSize properties I see the width and height both contain 0 afterwards, as if the property settings are discarding the value. I've even used hard-coded values instead of reading the coordinateSpace.bounds, to no avail.

The scene is allowing resizing well below these minimums, about 1/3 the width and 1/2 the height.

Anyone else observed this and have suggestions?