Hi Miguel,
Thanks for contacting Syncfusion support.
In our ReportViewer, if we export the report in PDF format then it will download in current page itself and it won’t redirect or affect the rendered page as shown in below shared screenshot. If the redirection occurs while exporting in PDF format, then share the problem arise screenshot to validate the mentioned issue at our end.
If we have misunderstood your requirement, then share detailed information about your scenario to provide solution for your requirement.
Regards,
Yuvaraj D.