When attempting to save the attached PPS to PDF using Aspose.Slides 14.2, the process consumes between 1-6GB of RAM and does not complete after hours of waiting. The GC heap is full of System.Byte[] objects. If run this in 32bit, I will just get a System.OutOfMemoryException thrown.
I am able to reproduce your mentioned issue after an initial test. Your issue has been registered in our issue tracking system with issue id: SLIDESNET-35300. You will be notified via this forum thread when the issue gets resolved.