Domain security - row level not applying

I'm trying to get the XML security file in place on a domain. 
I'm looking for role SANDMINE and want to match on the terminal

When I login as a user with that role and a value under terminal, it does not appear any filtering is happening.
I'm opening a basic Ad Hoc Report to test.

<securityDefinition xmlns="http://www.jaspersoft.com/2007/SL/XMLSchema" version="1.0" itemGroupDefaultAccess="granted">
      <resourceAccessGrants>
    <!-- Add row-level security rules in this section. -->

        <resourceAccessGrantList id="account_resource_access_grant" label="aLabel" resourceId="Onsite_Inventory">
     
            <resourceAccessGrants>
                <resourceAccessGrant id="account_ROLE_SANDMINE_row_grant">
                    <!-- <principalExpression>aPrincipalExpression</principalExpression> -->
                    <principalExpression>
                       authentication.getPrincipal().getRoles().any{ it.getRoleName() in ['SANDMINE'] }
                    </principalExpression>
                    <filterExpression>
                        terminal in (groovy('authentication.getPrincipal().getAttributes().find{ it.attrName == "terminal"}.attrValue')) 
                        
                    </filterExpression>
                    
                </resourceAccessGrant>
    
            </resourceAccessGrants>
            
        </resourceAccessGrantList>
    </resourceAccessGrants>
    <!-- _________________________________________ -->
    
    <itemGroupAccessGrants>
    </itemGroupAccessGrants>

</securityDefinition>

Any help or advice is greatly appreciated.