I have observed the presentation and comments shared by you. Can you please share that which version (Java or .NET) of Aspose.Slides you are using on your end. I also suggest you to please try using the latest version of Aspose.Slides for any of .NET or Java on your end first. If there is still an issue then please share the sample code used along with generated presentation. I will investigate the issue further on my end to help you out.