Android iText Pdf SignatureField - itext

Question

iText kernel;
When I give a specific rectangle and create a signature field, the location of the signature field changes.
val pdfReader: com.itextpdf.kernel.pdf.PdfReader =
com.itextpdf.kernel.pdf.PdfReader(FileInputStream(file2))
val pdfWriter = PdfWriter(dest)
val document = PdfDocument(pdfReader, pdfWriter)
val page: PdfPage = document.getPage(page)
val extractionStrategy = TextPlusXYExtractionStrategy()
val parser = PdfCanvasProcessor(extractionStrategy)
parser.processPageContent(page);
for (i in signatures) {
val rWidth = 200f
val rHeight = 200f
val acroForm = PdfAcroForm.getAcroForm(document, true)
val signature: PdfFormField = PdfSignatureFormField.createSignature(
document,
com.itextpdf.kernel.geom.Rectangle(i.rect.left.toFloat(), i.rect.top.toFloat(), rWidth, rHeight)
)
signature.setVisibility(0)
signature.setFieldName(System.currentTimeMillis().toString() + UUID.randomUUID())
acroForm.addField(signature, page)
}
document.close()
///////////////////////////////////////////////////////////////////
widht = 200
height = 200
Rect 1;
x = 383.0
y = 209.0
Rect2;
x = 440.0
y = 530.0
Rect3;
x = 464.0
y = 879.0
Rect4;
x = 242.0
y = 872.0
Rect5;
x = 255.0
y = 493.0
Result;