I can grab and drag an image onto an image, but it immediately disappears.If I drag a littleImage onto a FtbllImage, then as soon as I release it, the littleImage disappears and is not saved on top What could be the cause and how can I fix it?

class ViewController: UIViewController, UIDragInteractionDelegate,UIDropInteractionDelegate {

@IBOutlet weak var directIV: UIImageView!
@IBOutlet weak var littleIV: UIImageView!
override func viewDidLoad() {
    super.viewDidLoad()
    
    let dragInteraction = UIDragInteraction(delegate: self)
    littleIV.addInteraction(dragInteraction)

    directIV.isUserInteractionEnabled = true
    littleIV.isUserInteractionEnabled = true
    
    let dropInteraction = UIDropInteraction(delegate: self)
    directIV.addInteraction(dropInteraction)
    
    directIV.image = UIImage(named: "FtbllImage")
    littleIV.image = UIImage(named: "player")
    
}

func dragInteraction(_ interaction: UIDragInteraction, itemsForBeginning session: UIDragSession) -> [UIDragItem] {
    let itemProvider = NSItemProvider(object: directIV.image!)
    let dragItem = UIDragItem(itemProvider: itemProvider)
    return [dragItem]
}


func dropInteraction(_ interaction: UIDropInteraction, canHandle session: UIDropSession) -> Bool {
    return session.canLoadObjects(ofClass: UIImage.self)
}

func dropInteraction(_ interaction: UIDropInteraction, sessionDidUpdate session: UIDropSession) -> UIDropProposal {
    let operation: UIDropOperation = session.localDragSession == nil ? .copy : .move
    return UIDropProposal(operation: operation)
}

func dropInteraction(_ interaction: UIDropInteraction, performDrop session: UIDropSession) {
    session.loadObjects(ofClass: UIImage.self) { imageItems in
        guard let images = imageItems as? [UIImage], let image = images.first else { return }
        DispatchQueue.main.async {
            self.directIV.image = image
        }
    }
}

}

I’m trying to figure out the drag and drop mechanics for another app of mine, but I don’t understand why the image disappears after dragging here