Thanks for your inquiry. To ensure a timely and accurate response, please attach the following resources here for testing:
Your input PDF document
Aspose.Pdf generated output document which shows the undesired behavior
Source code to reproduce the issue on our end
As soon as you get these pieces of information ready, we'll start investigation into your issue and provide you more information. Thanks for your cooperation.
Secondly, as your query is more related to Aspose.Pdf API, I am moving your thread in Aspose.Pdf forum. My colleagues from Aspose.Pdf team will answer you shortly.