Printformat, Supress Repeats doesnt work for HTML and XLS

Problem: Cant export to xls or display html with , Surpress Repeats settings. Columns still repeated. See attachemnts illustrate issue in case html and xls screenshot.

Steps to reproduce:
1. open report open orders –> sales No. (GardenWorld display data)
2. edit print format
3. got to print format items >> select busines partner column >> select Surpress Repeats and save the records
4. run cache reset
5. Re-Run report open orders >> Switch to HTML or XLS << BUG column values are still repeated.