The following API calls produce the failing XLSX when applied to the attached file:
workbook.Worksheets.RemoveAt(11);
workbook.Worksheets.RemoveAt(3);
workbook.Worksheets.RemoveAt(2);
workbook.Worksheets.RemoveAt(1);
workbook.Worksheets.RemoveAt(0);
It seems to be a common type of bugs, please take a look. The issue observe with Aspose.Cells v8.6.