Thanks for the template XLSX file and screenshots.
After an initial test, I am able to reproduce the issue as you mentioned (via screenshots) by converting your template XLSX file to PDF. I found some values are missing on x-axis on bar chart compared to the chart in original Excel file.
e.g. Sample code:
Workbook workbook = new Workbook("f:\\files\\missing_values.xlsx");
workbook.save("f:\\files\\out1.pdf");
We need to evaluate your issue thoroughly. We have opened the following new ticket(s) in our internal issue tracking system and will deliver their fixes according to the terms mentioned in support policies.
Issue ID(s): CELLSJAVA-45524
Once we have an update on it, we will let you know.
The fix will be included in an upcoming release (Aspose.Cells v23.8) that we plan to release in the first half of August 2023. You will be notified when the next version is released.