SSRS.csv Export Issue

We are currently facing an issue with the CSV export functionality in SSRS reports-both through manual export and via subscriptions. Specifically, the column headers in the exported.csv file are not matching the header names defined in the report layout.

For example, a column labeled "Customer Name" in the report layout is appearing as "Customer_Name" in the exported CSV file. This discrepancy is causing challenges in downstream processes that rely on consistent header naming.

Due to access limitations I can not make changes to server config file so I am looking for help on report level solution or advise