iOS: App freezes when start typing in UISearchBar

Question

I have a UICollectionViewController and I show the search bar when the user taps on a button. But when the user start typing in the search field the app freezes and the memory starts skyrocking on this line

self.collectionView?.reloadData()

This is happening ONLY in iOS 15+. All version before that are working like a charm.

Here is my code:

//Create search bar

lazy var searchBar: UISearchBar = {
    let sb = UISearchBar()
    sb.placeholder = "Enter search text"
    sb.barTintColor = .darkGray
    sb.tintColor = .darkGray
    UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).backgroundColor = .white
    UITextField.appearance(whenContainedInInstancesOf: [UISearchBar.self]).textColor = .darkGray
    sb.delegate = self
    return sb
}()

When the user taps on a button I add it to the navigation bar

   fileprivate func addSearchBar() {
        navigationController?.navigationBar.addSubview(searchBar)
        searchBar.anchor(top: navigationController?.navigationBar.topAnchor, left: navigationController?.navigationBar.leftAnchor, bottom: navigationController?.navigationBar.bottomAnchor, right: navigationController?.navigationBar.rightAnchor, paddingTop: 4, paddingLeft: 64, paddingBottom: 4, paddingRight: 64, width: 0, height: 0, centerX: navigationController?.navigationBar.centerXAnchor, centerY: navigationController?.navigationBar.centerYAnchor)
        navigationItem.title = ""
        searchBar.becomeFirstResponder()
    }

And when the user start typing the searchBar func is called

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String) {
        if searchText.isEmpty {
            filteredItems = items
        } else {
            filteredItems = self.items.filter { (item) -> Bool in
                let name = items.name?.lowercased()
                let search = searchText.lowercased()
                return ((name?.contains(search))!)
            }
            if filteredItems.count == 0 {
                emptyCellTitle = "No items found."
            }
        }

        self.collectionView?.reloadData() // the freeze happens here

    }

When the

func searchBar(_ searchBar: UISearchBar, textDidChange searchText: String)

is removed there is no freeze and the user can type what he wants without problems but the data is not filtered.

Currently I'm out of options. I have tried every solution I found but nothing is working. Any suggestion will be highly appreciated!

Again, this is happening ONLY in iOS 15 and up. Thanks!