Dear Aspose Support,
Thanks for your posting and using Aspose.Cells for .NET.
I was able to replicate this issue using the latest version:
for .NET v126.96.36.199
with your sample code.
We have logged this issue in our database. We will look into it and fix the issue.
Once the issue is fixed or we have some other update for you, we will let you know asap.
This issue has been logged as CELLSNET-41034.
We have fixed this issue.
Please download and try this fix: Aspose.Cells for .NET v188.8.131.52 and let us know your feedback.