searchResultsController with a UITableViewController hides the navigation bar, how to prevent it?

When I assign a TableViewController as the constructor for UISearchController, when the table is loaded, it hides the navigation bar (that includes title and search bar). How can I make it, so it doesn't hide it?

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        configureNavigationItem()
    }
}

extension ViewController {

    private func configureNavigationItem() {
        let resultsController =  UITableViewController(style: .plain)
        navigationItem.searchController = UISearchController(searchResultsController: resultsController)
        navigationItem.hidesSearchBarWhenScrolling = false
    }
}

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