Losing document protection

When I protect a .docx document with Microsoft Word functionality, and then save it with Aspose the protection password is changed.
This problem does not happen for .doc documents.

Aspose Words Version: 15.6.0

Word.png (8.9 KB)
Code.png (6.7 KB)

@acttive2016,

Thanks for your inquiry. Please upgrade to the latest version of Aspose.Words for .NET 17.9 and let us know how it goes on your side. Hope this helps you. If you still face problem, please ZIP and attach your input Word document here for testing. We will investigate the issue on our side and provide you more information.