How to correctly copy text from a pdf file using PdfKit and Swift

Question

Is there any way to achieve correct copying of text from pdf so that the line order is correct as on the original page. I am trying to copy text from a pdf file using PdfKit. But the text is copied sometimes (rarely enough) but with errors. Can anyone tell me why this is happening and how to avoid it.

func searchPDF() {
     guard let path = Bundle.main.path(forResource: "Sample0102 (1)", ofType: "pdf") else {
         print("PDF file not found")
         return
     }
            
    // Create a URL object from the path
    let url = URL(fileURLWithPath: path)
            
    // Create a PDF document object from the URL
    guard let pdfDocument = PDFDocument(url: url) else {
        print("Could not create PDF document")
        return
    }
            
    for i in 0 ..< pdfDocument.pageCount {
        guard let pdfPage = pdfDocument.page(at: i) else {
            continue
        }
                
         guard let pageText = pdfPage.string else {
            continue
         }
    print (pageText)
    }
}

white - original pdf, black - console output