Incorrect server configured on RDP client

Hi

Platform: Server 2016 Remote Desktop Server

VM Server 1: Connection Broker
VM Server 2: Gateway and RD Web App
VM Server 3: Session Host 

We have a RDS collection which is working well. However when recently moving to publish the RDP connector in RD Web we have found on download, it is configured to connect to the Connection Broker andnot the Session Host. The connector cannot be edited either. 

Not sure what to do from here..

Many Thanks  

MIS5000