Cannot use PHPickerViewController to load mpeg-4 video

I'm trying to use PHPickerViewController to load video from user's photo library. Here is my code:

func videoSelectorAskForSelectFromAlbum(_ selector: VideoSelector) {
    var config = PHPickerConfiguration(photoLibrary: PHPhotoLibrary.shared())
    config.selectionLimit = 1
    config.filter = .videos
    config.preferredAssetRepresentationMode = .compatible

    let picker = PHPickerViewController(configuration: config)
    picker.delegate = self
    present(picker, animated: true)
}

func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
    guard results.count == 1 else {
        picker.dismiss(animated: true)
        return
    }
    let provider = results[0].itemProvider
    guard let identifier = provider.registeredTypeIdentifiers.first, provider.hasItemConformingToTypeIdentifier(identifier) else {
        picker.dismiss(animated: true)
        return
    }
    picker.dismiss(animated: true) { [self] in
        // provider.loadFileRepresentation cause error
        videoLoadingProgress = provider.loadFileRepresentation(forTypeIdentifier: identifier) { url, err in
            print(url)
        }
    }
}

Everything is ok on Simulator, however, when I run it on a real iPad and select a video from photo library, it crashed with errors:

[claims] 2F5DAD68-8F99-4A84-8BF2-3BF0AEB0027F grantAccessClaim reply is an error: Error Domain=NSCocoaErrorDomain Code=4101 "Couldn’t communicate with a helper application." UserInfo={NSUnderlyingError=0x282ed17d0 {Error Domain=PFPAssetRequestErrorDomain Code=0 "The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)" UserInfo={NSLocalizedDescription=The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)}}}

Error copying file type public.mpeg-4. Error: Error Domain=NSItemProviderErrorDomain Code=-1000 "Cannot load representation of type public.mpeg-4" UserInfo={NSLocalizedDescription=Cannot load representation of type public.mpeg-4, NSUnderlyingError=0x282ed2dc0 {Error Domain=NSCocoaErrorDomain Code=4101 "Couldn’t communicate with a helper application." UserInfo={NSUnderlyingError=0x282ed17d0 {Error Domain=PFPAssetRequestErrorDomain Code=0 "The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)" UserInfo={NSLocalizedDescription=The operation couldn’t be completed. (PFPAssetRequestErrorDomain error 0.)}}}}}

I checked the info of the video file, its extension is .mp4 which shows "public.mpeg-4" in code. The strange thing is, when I try to load a .mov file which shows "com.apple.quicktime-movie" in code, it runs well without error! I'm confused and struggling with it, Is that a bug? or I'm using PHPickerViewController in wrong way?