SSRS Reports Rendering into CSV with Wildcard characters in Column

I am using "#", "$" in my SQL Stored Procedure.

When SSRS outputs the columns headers it changes all the wildcard characters to a "_" i.e. CreditScore# as "CreditScore_" and Currency$ as "Currency_".

This only happens when I outputting the report as a CSV file. The wildcard characters remains same in other output formats like

Is there any way to display the wildcard characters correctly in CSV file.

Thanks in advance