Help needed: BackItem broken for UITests about eachnavigationbar HOT 6 OPEN

private func setupNavigationBar() {
    self.navigation.configuration.isEnabled = true
    self.navigation.configuration.titleTextAttributes = [
      .foregroundColor: Colour.text
    ]
    self.navigation.configuration.barTintColor = Colour.layer1
    self.navigation.configuration.isTranslucent = false
    self.navigation.configuration.isHidden = true
    self.navigation.configuration.backItem = UINavigationController
      .Configuration
      .BackItem(style: .image(Image.back),
                tintColor: Colour.text)
    
  }

private fund setupNavigationBar() {
    self.navigation.bar.isHidden = false
    
    self.navigation.bar.prefersLargeTitles = false
    self.navigation.item.largeTitleDisplayMode = .never
    self.navigation.bar.additionalHeight = 20
    
    // acts as a bit of a skirt to keep the label off the bottom of the nav bar
    let navFooter = UIView(frame: CGRect(x: 0, y: 0, width: 100, height: 18))
    navFooter.backgroundColor = Colour.layer1
    self.navigation.bar.additionalView = navFooter
    
     // title
    let label = UILabel(frame: .zero)
    label.text = "Explore"
    label.font = Fonts.h2
    self.navigation.item.leftBarButtonItem = UIBarButtonItem(customView: label)

     // search button
    let imageview = UIImageView()
    imageview.image = Image.search.withRenderingMode(.alwaysTemplate)
    imageview.tintColor = Colour.text
    
    let searchButton = UIButton(type: .custom)
    searchButton.addTarget(buttonTarget, action: buttonSelector, for: .touchUpInside)
    searchButton.addSubview(imageview)
    searchButton.accessibilityIdentifier = "nav_button"
    
   // snapkit constraints
    imageview.snp.makeConstraints { (make) in
      make.width.height.equalTo(24)
      make.left.right.equalToSuperview()
      make.top.bottom.equalToSuperview().inset(10)
    }
    
    self.navigation.item.rightBarButtonItem = UIBarButtonItem(customView: searchButton)
}

trendingViewController.navigationItem.title = "Trending"

    self.navigation.bar.prefersLargeTitles = true
    self.navigation.item.largeTitleDisplayMode = .always

    let app = XCUIApplication()
    // tap cell to get into view controller
    // test element exists
    app.navigationBars.buttons.element(boundBy: 0).tap() // <-- fails

navigation.bar.backBarButtonItem = .init(style: .image(image))