Proxying GENA application

I'm load balancing a Subscription-Notification-based GENA application. The client connects to the server. The server establishes callback socket connection for SOAP-based notifications to client. The first part works ok but I've had a few problems with the callbacks - using the default http profile, v13.0.0. The connection works perfectly initially for about 10 minutes (at this time the call back data is not much, it increases with time) and then progressively degrades.

What seems to happen is that tcp segments in a way that is not sensible so splits the soap message. The subscriber receives the malformed data and immediately drops the socket.

Does anyone know a http / tcp profile combination that fixes this, the defaults don't work here. Any help would be much appreciated

K42151600: Error Message: 011f0016:3: - Invalid action:

 Server sends too much data. serverside () clientside ()