Results with spotlight in Core Data is not all.

I'm using Core Data to save data. Then I wanna add spotlight support.

self.spotlightDelegate = StorageSpotlightDelegate(forStoreWith: description, coordinator: container.persistentStoreCoordinator)
        let isSpotlightDisable = UserDefaults.standard.bool(forKey: "isSpotlightDisable")
        if !isSpotlightDisable {
            self.toggleSpotlightIndexing(enable: true)
        }

public func toggleSpotlightIndexing(enable: Bool) {
        guard let spotlightDelegate = spotlightDelegate else { return }
        
        if enable {
            spotlightDelegate.startSpotlightIndexing()
        } else {
            spotlightDelegate.stopSpotlightIndexing()
            spotlightDelegate.deleteSpotlightIndex { error in
                if let error = error {
                    print(error)
                }
            }
        }
        
        UserDefaults.standard.set(!enable, forKey: "isSpotlightDisable")
    }

It works fine on an iOS15 device, but not work on iOS 17&18.

On iOS 18 devices, I can search the data when the first time to added to Core Data. But if I stop spotlight indexing and restart again, the data is never be searched.

How can I to solve this? And I noticed that the problem is also exists in another dictionary app.