Thanks for using our products. The issue seems to be related to Aspose.Cells for SharePoint so I am moving this thread to respective forum. I hope our team of experts taking care of this product would be in better position to answer this query. We apologize for your inconvenience.
I even tested using Aspose.Cells for .NET v7.0.3.1, it works but not accurately enough, the arrow is not connected with the diamond shape in the org chart. So, we should fix it in the Aspose.Cells for .NET first and then for Aspose.Cells for SharePoint component, since Aspose.Cells for SharePoint is using Aspose.Cells for .NET on the background. An issue is logged with an id: CELLSNET-40118. We will look into it soon.