End user portal created CSV report does not contain header

Customer created a CSV report by them selves in End user portal (v. 8.1.2) but the CSV does not contain headers when they receive it in email.

I checked the process (RPS_RPSSubscription_Send_Report) which sends the report, but weirdly there is parameter CsvSkipColumnHeaders" in step Generate report, which does not even get run when report is CSV (comment in step: If ExportFormat is not CSV render the report.). And in step: Export CSV there is no CsvSkipColumnHeaders -parameter. So I'm bit lost how i can get those headers to CSV report?