We have one more file and it looks like it has the same problem as files in main post.
It contains distorted text when we convert it to PDF/A-2a and it does not pass validation for PDF/A-1b.
See the source file and converted by Aspose.Pdf 17.4.0 in attachment
The issues you have found earlier (filed as PDFNET-42581) have been fixed in Aspose.Pdf for .NET 17.6.
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We have tested the new version of Aspose library and see that distored text issue was fixed indeed. Thank you for this!
However there was another validation issue reported regarding the file - output file is not PDF/A-1b complient. And this issue is still reproduced with the new library version.
Can you please take a look?
Thanks for writing back.
Would you please share the sample PDF document, so that we can test the scenario in our environment and address it accordingly.