Thanks for your posting and using Aspose.Cells for .NET.
We were able to replicate this issue using the latest version with your source file. Please see the attached screenshot for a reference. We have logged this issue in our database. We will look into it and resolve this issue. Once the issue is resolved or we have some other update for you, we will let you know asap.
We are pleased to know that your issue is fixed with the latest version. If you encounter any other issue, please feel free to post, we will be glad to help you further.