Converting certain PDF with Thai font to HTML, leads to incorrect results in .NET

When converting the attached PDF file to HTML with GroupDocs.Viewer 23.10, some decoration characters of the font are lost.
I attached a “comparison.png” to highlight the differences between the original PDF and the output HTML.
Can you please check and let me know if there is any way to fix this?
Thai Font issue.zip (488.9 KB)

@Clemens_Pestuka

Thank you for sharing the details. I seems to be an issue related to the way we’re handling AngsanaUPC font that is used in the document. As soon as we have any information we’ll let you know.

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