Document map in paginated report

Hi

I am trying to create document map in paginated report in power bi report builder and it is working as expected below in report builder. .

But when I publish to service document maps are not populating .Am i missing something,this is a ssrs rdl report which i am trying to migrate it to powerbi.

I am using below expression in documentmaplabel.

=FormatDateTime(Fields!Date.Value, DateFormat.ShortDate)

Any help here?

Thanks..