Visio file is missing text after rendering to PDF in .NET

When converting the attached Visio file to PDF, some parts of the text are missing (see screenshot).
missing text.zip (354.5 KB)

The problem occurs with GroupDocs.Viewer API 20.11.0 (and older) and we would need a fix.


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@Clemens_Pestuka

We are investigating this issue. Your investigation ticket ID is VIEWERNET-2957. You’ll be notified in case of any update.

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Hi @Clemens_Pestuka

This issue will be fixed in the current release (21.9). I will reply on this topic.

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@Clemens_Pestuka

GroupDocs.Viewer for .NET v21.9 that includes fix for this issue has been published. You can find the new version at

Have a nice day!