I have problem with one of presentations (Slides 4.3.0.0). During PPTX to PDF covertion it hangs application and never gone back. Waiting for about 10 minutes and no result was returned. Presentation attached. I not able to use early slides version regarding few files opening problem.
I have been able to observe the issue specified by you and it seems to be an inconsistency in Aspose.Slides for .NET. An issue with ID 20056 has been created in our issue tracking system to further investigate and resolve the problem. This thread has been linked with the issue, so that you may be automatically notified, once the issue is resolved.