QuickLook/QLPreviewController PDF Text Annotation background becomes black and font becomes small - ios

Question

I am Using QLPreviewController for editing the PDF. Everything is working properly but
if I add text annotation from the QLPreviewController and click on the done button it is working as expected I am getting the URL with edited PDF and if I do other changes for example add image annotation from outside of QLPreviewController and save that pdf using the code
self.pdfDocument.write(to: self.pdfUrl)
and if I open that pdf in the QLPReviewController and tap on the previously added text then the text annotation background becomes Black and the font becomes small.
I have attached the video please check.
**Video Link : ** https://www.dropbox.com/s/m0ql1csr8pars3t/Issue_video.mov?dl=0
I have used the below code for pdf mark up
func openPreview(_ url : URL){
let previewController = QLPreviewController()
previewController.isEditing = true
previewController.delegate = self
self.pdfUrl = url
previewController.dataSource = self
previewController.modalPresentationStyle = .overFullScreen
self.present(previewController, animated: true, completion: nil)
}
extension ViewController : QLPreviewControllerDataSource,QLPreviewControllerDelegate{
func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
return 1
}
func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
return self.pdfUrl as QLPreviewItem
}
func previewController(_ controller: QLPreviewController, editingModeFor previewItem: QLPreviewItem) -> QLPreviewItemEditingMode {
return .updateContents
}
func previewControllerWillDismiss(_ controller: QLPreviewController) {
}
func previewController(_ controller: QLPreviewController, didUpdateContentsOf previewItem: QLPreviewItem) {
DispatchQueue.main.async {
self.pdfUrl = previewItem.previewItemURL
self.setPDFFile()
self.pdfDocument.write(to: self.pdfUrl)
}
}
}
func setPDFFile(){
if let doc = PDFDocument(url: self.pdfUrl){
self.pdfDocument = doc
self.pdfView.document = doc
}
}