setNavigationBarHidden doesn't works after setViewControllers

I found that `setNavigationBarHidden` doesn't works after `setViewControllers`?

This is my code:

* `HomeNavController.swift`:

class HomeNavController: UINavigationController {

    weak var tabBar: HomeTabBar!

    var tab: HomeTab = .match {
        didSet {
            switch self.tab {
            case .match:
                self.setViewControllers([MatchViewController()], animated: false)
            case .moments:
                self.setViewControllers([MomentsViewController()], animated: false)
            case .myPosts:
                self.setViewControllers([PostsViewController()], animated: false)
            }
        }
    }
}

* `MatchViewController.swift`

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)

    self.navigationController?.setNavigationBarHidden(true, animated: false)
}

It works well when I first switch to `MatchViewController` instance, but it doesn't works after I change the `HomeNavController` instance's viewControllers with func `setViewControllers`.

Is it a bug of `UINavigationController`?