Thanks for your inquiry. I have tested your scenario with Aspose.Pdf for .NET 11.4.0 and managed to observe the reported issue. For further investigation, I have logged an issue in our issue tracking system as PDFNEWNET-40450 and also linked your request to it. We will keep you updated via this thread regarding the issue status.
We are sorry for the inconvenience caused.
The issues you have found earlier (filed as PDFNET-40450) have been fixed in Aspose.PDF for .NET 22.5.