Navigation title and navBarItems in UITabbarcontroller is hiding automatically when expanding the collpsed splitview in iPad.

class TabBarController: UITabBarController,UISplitViewControllerDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        let tabTitles = ["First", "Second", "Third", "Fourth", "Fifth", "Sixth"]
        if #available(iOS 18.0, *) {
            mode = .tabSidebar
            var tabs = [UITab]()

            for title in tabTitles {
                let tab = UITab(title: title, image: UIImage(systemName: "leaf"), identifier: title, viewControllerProvider: {_ in
                    return self.createSplitViewController()
                })
                tabs.append(tab)
            }
            setTabs(tabs, animated: true)
        }


    }

    func createSplitViewController() -> UISplitViewController {
        let splitViewController = UISplitViewController()
        splitViewController.preferredDisplayMode = .oneBesideSecondary

        let masterViewController = UINavigationController(rootViewController: MasterViewController())
        let detailViewController = UINavigationController(rootViewController: DetailViewController())
        masterViewController.navigationBar.backgroundColor = .red
        detailViewController.navigationBar.backgroundColor = .blue

        splitViewController.viewControllers = [masterViewController, detailViewController]
        return splitViewController
    }
}

This issue persist in UITabBarController’s subclass as will as while using UITabBarController as child viewcontroller.https://i.sstatic.net/xF3ekVUi.jpg