Duplicate Sessions - RAS v15.5 (build 15566)

We're seeing that RAS is allowing duplicate sessions to be created despite both the RAS gateway and necessary GPOs setup on the network. We have an engineering ticket open to look into this but haven't received a response in a quite a while (just called again today, support doesn't have access to development boards). I wanted to see if anyone else has noticed a similar problem:
RAS Gateway: Windows Server 2008 R2
RDP Hosts (x2): Windows Server 2008 R2
Gateway Config:
- Load Balancing > Limit User to one session per desktop (checked)
- Load Balancing > Reconnect to disconnected sessions (checked)
GPO:
- Computer Config > Policies > Admin Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Connections > Restrict Remote Desktop Services users to a single Remote Desktop Services session (enabled)

I reviewed all of GPOs and there's no conflicting polices that I can find.

 

I know this was nine years ago but did you end up getting a resolution for this? I'm having exactly the same issue in 2025.