Please notice, I am able to reproduce the issue as you mentioned by using your template file. I found when exporting the workbook to HTML, the legend in the chart is not the same as MS Excel. I have logged a ticket with an id “CELLSJAVA-44202” for your issue. We will look into it soon.
Once we have an update on it, we will let you know.
This is to inform you that your issue has been resolved now. The fix will be included in the (upcoming) release (Aspose.Cells for Java v22.7), which is scheduled to be published in the second week of July 2022. You will also be notified when the next version is released.
The issues you have found earlier (filed as CELLSJAVA-44202) have been fixed in this update. This message was posted using Bugs notification tool by Peyton.Xu