Hi Randy,
Thank you for trying the latest release.
As you have mentioned that the latest build doesn’t exhibit the problem as you were experiencing with your current version of the Aspose.Cells for .NET component so you may be right about the behavior being a bug in the API. According to the company policy, we cannot provide a fix with your current version (5.3.3.0), therefore you have to upgrade the the API to a recent release. We strongly recommend you to upgrade the component to the latest build, that is; Aspose.Cells for .NET 8.1.0 because we have made significant performance improvements in the recent releases.
Please feel free to write back in case you have any concerns.