Pivot calculation values are not calculated properly. This issue occurs only if the "FieldName" value contains special character like "\n".
If the FieldName is "LH Leg_x000a_Qty", the ItemProperties should return the null value. If the value is "LH LegQty"(without new line character), ItemProperties returns the property descriptor value as expected.
1.Run the attached demo.
2.Click the export button.
3.Now open the exported PDF file.
4.Check the pivot calculations values and you can see the unexpected result.