Thanks for your posting and using the Aspose.Cells for Java.
I found, you are using the older version. We cannot fix the bugs based on the older version.
So, we recommend you to upgrade your code and use the latest version instead:
Aspose.Cells for Java (Latest Version)
Also, I have tested your file and found it is working fine with the latest version. Please see the code below and output file.
String filePath = “F:\Shak-Data-RW\Downloads\DELTA.xlsx”;
Workbook workbook = new Workbook(filePath);
workbook.save(filePath + “.out.xlsx”);