performDrop returns true, but drag image animates away

I have a view that conforms to DropDelegate. When a file is dragged from the Finder and dropped on the view, the performDrop(info:) method successfully extracts a URL from the item provider and returns true, but the drag image slides away as if the drop had been rejected. Why?

	func performDrop(info: DropInfo) -> Bool {
		bgColor = .yellow
		let providers = info.itemProviders(for: [.fileURL])
		print("performDrop, providers: \(providers.count)")
		if let aProvider = providers.first
		{
			if aProvider.hasItemConformingToTypeIdentifier(UTType.url.identifier)
			{
				aProvider.loadItem(forTypeIdentifier: UTType.url.identifier)
				{ (item, error) in
					if let error = error {
						print("Error retrieving item provider data: \(error.localizedDescription)")
						return
					}
					if let url = item as? URL
					{
						print("Received file URL (from Data.1): \(url)")
					}
					else if let data = item as? Data, let url = URL(dataRepresentation: data, relativeTo: nil)
					{
						print("Received file URL (from Data.2): \(url)")
					}
				}
			}
		}
		return true
	}