We have investigated your issue using your files a bit. We need to share the files with Microsoft for thorough evaluation, analysis and discussions. Could you please give us permission to share your files with the third party (Microsoft support)?
We will keep you updated with details for your issue.
OK, Thanks…
@Jerry1019,
Thank you for granting the permission to share the sample file with Microsoft. We will write back here immediately once any feedback is ready to share.
Please try using our latest version/fix: Aspose.Note for .NET v20.5
Aspose.Note for .NET v20.5 (Downloads section)
Aspose.Note for .NET v20.5 (Nuget repos.)
Your issue should be fixed in it.
Let us know your feedback.