Thanks for your posting and using Aspose.Cells for Java.
We were able to observe this issue after converting your xlsx file into pdf using the latest version: Aspose.Cells for Java 8.0.2. The stacked area series are in front of the bar series, hiding the bars behind the stacked area.
We have logged this issue in our database for investigation. We will look into it and fix this issue. Once, the issue is resolved or we have some other update for you, we will let you know asap.
This issue has been logged as CELLSJAVA-40830.
String filePath = “F:\Shak-Data-RW\Downloads\Template.xlsx”;
Workbook workbook = new Workbook(filePath);
workbook.save(filePath + “.output.pdf”);