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Colors of 8 bit png images get randomized when you set a OwnerPassword using DocIORenderer.ConvertToPDF

Like the Title says when you use the DocIORenderer.ConvertToPDF() function to create a pdf document from a Docx file and set a OwnerPassword using doc.Security.OwnerPassword PNG images with a 8 bitcolor mapping get randomized colors

Here is the used code:

using var renderer = new DocIORenderer();
renderer.Settings.EmbedCompleteFonts = true;
using var pdfDocument = renderer.ConvertToPDF(doc);
pdfDocument.Security.OwnerPassword = new Random().Next().ToString();
pdfDocument.Security.Permissions = PdfPermissionsFlags.AccessibilityCopyContent | PdfPermissionsFlags.Print | PdfPermissionsFlags.FullQualityPrint;
var memoryStream = new MemoryStream();
pdfDocument.Save(memoryStream);​


When i comment out the OwnerPassword then the colors get rendered correctly.


I uploaded an image that gets the randomized colors in the attachments