How to cancel a Drag/Drop item loading in UIKit

After a drag/drop of an item into my app's collectionView, UIKit shows this progress UI while the data loads:

How do I cancel the loading of the dropped items when the user cancels? The itemProvider.loadFileRepresentation completion block is always called without error. What am I missing?

 coordinator.session.progress.cancellationHandler = {
       Task { @MainActor in
                // User canceled the dropped items loading
        }
     }

for item in coordinator.items {
            item.dragItem.itemProvider.loadFileRepresentation(forTypeIdentifier: AVFileType.mov.rawValue) { [ weak self] (videoURL, error) in
          // This completion block will get called even after operation was canceled.
  }
}