Are you aware of any workaround for incorrectly displaying PDFs with semitransparent colors in latest Syncfusion WPF PdfViewer?
I have filed a bug report: https://www.syncfusion.com/forums/132687/pdfviewer-incorrectly-display-and-print-pdfs-with-semitransparent-colors , but it will probably take a while to fix it.
Thanks, Peter