AcceptedAtRouteResult in isolated process

[MarioMajcicaAtABNAMRO]

We are moving from the inproc model to isolated process model. We are facing certain hiccups. One of the annoying ones is the following.

We do often return AcceptedAtRouteResult from our durable function. The following code sample works as expected in the inproc function:

return new AcceptedAtRouteResult(nameof(ServiceConnectionCreationGetStatus), new { orchestrationId }, response);

However, the same in isolated model throws an exception:

Result: Function 'ServiceConnectionCreate', Invocation id '5ba8911a-cc70-417c-826a-81d8e64cf349': An exception was thrown by the invocation.
Exception: System.InvalidOperationException: No route matches the supplied values.

Does anyone know how to make this work or and why is this now the behavior? I can't find anything in this regard in the documentation, and this is the only issues that seems relevant #10393

Any help would be appreciated.