ICM Scripting. value on variable Call.RoutingClient

Scenario:
- UCCE 8.5 with CVP 8.5 - Type 10 NVRU
- Call initiated from a IP Phone dialing a CTI RP.
- CUCM is the routing client of the original call.
- UCCE script launch.
- Eventually the call hits a SendToVRU node.
- At this time the NVRU label is sent back to CUCM. CUCM then sends the call to the CVP Call Server, and the routing client changes to be the CVP Call Server.
- Afterward the call re-enters the UCCE script and I would expect variable Call.RoutingClient to contain the name of the CVP Call Server but still holds the name of the CUCM routing client.
- Curiously the value of Call.RoutingClientId changes to the dbid (RCID) of the corresponding CVP Call Server routing client, which is normal because the RCID is used by the router to send the labels to the right routing client.
Thus, I am curious why the disconnect between Call.RoutingClient and Call.RoutingClientID on CUCM originated calls after the routing client changes from CUCM to CVP Call Server.
Which value should I expect on variable Call.RoutingClient? The original routing client, or the current routing client?

The way I see it, the originating CUCM is a factor to determine which CVP Call Server will handle the call. After that, which VXML GW, VXML Server or media server decisions are made based on the location of the CVP Call Server and no so much the CUCM. To ensure that the closest VXML GW is use you need to use either different Network VRU labels for the CVP Call Server routing clients, or other mechanisms. CUCM will decide only which CVP Call Server the call connects in first place, and after that all decisions are off CUCM realm.
Below is a more detailed description of what I am trying to accomplish.
When the originating party dials the CUCM Route Point that triggers and associated ICM script. Eventually the script reaches the SendToVRU node and sends the label defined for the CUCM peripheral on the Network VRU. That is a first transfer to a CVP Call Server and CUCM will handle it because at this time CUCM is still the routing client.
When CUCM receives the label a decision is made either by CUCM route patterns with static routes (this is my case), SIP Proxy or H.323 GK, to which CVP Call Server to send the call. If you have different CUCM clusters you can have different labels and make different decision (the Bangalore cluster send calls to CVP Call Servers in Bangalore, the London cluster uses CVP Call Server in London, and so on). If you have only one cluster serving agents all over the planet I don't think there is much room to fine control the CVP Call Server decision based on the actual location of the agent's phone that is what really matters.
Anyway. when the call is connected to the CVP Call Server the routing client functions are passed to the CVP Call Server and CUCM is at that time totally out of the picture as far as routing decisions go.
The call re-enters the ICM Script now with a CVP Call Server being the routing client, and the CVP Call Server Routing Client Network VRU label is sent this time to the CVP Call Server looking for a VXML GW. That is a second transfers that is performed behind the scenes and is not expliticly seen on the ICM script.
All the above works just fine.
The challenge I am having is that I am using CVP Combos (VXML and CVP Call Server together) and I want to use the VXML Server that is co-resident with the CVP Call Server handling the call. Obviously I don't have a SIP proxy or a CSS on the solution.
To achieve that I have created ip host entries on the VXML GW to match the CVP Call Server routing client. For example if my CVP Call Server routing client name is CVP01 I have the following entries on the VXML GW
ip host CPV01 10.0.0.1
ip host CVP01-backup 10.0.0.2
and on my ICM script I want to use variable {Call.RoutingClient} to create the VXML Server url that goes in the microapp.media_server variable.
That achieves two purposes, first that I always use the co-resident VXML server to service the call, and second provides a basic redundancy through the CVP IVR -backup mechanism.
It works just fine on the inbound calls because the value on Call.RoutingClient is correct, referring to the name of the routing client for the CVP Call Server handling the call.
The problem is that for the CUCM originated calls, even if the routing client changed to be one of the CVP Call Servers, the value on the variable Call.RoutingClient still refers to the CUCM routing client name.
Again, variable Call.RoutingClientID value is always correct. The issue is with the value on the Call.RoutingClient.
I would assume that both should be consistent, and they are not at this time. There are workarounds but there are not as clean as I would like.
The cleanest workaround I have come up with is to define ip host entries on the VXML GW to match the CUCM routing client name, but I think that is confussing for anyone reading the GW configuration that will wonder why the reference to CUCM.
So far at this time on the ICM script I have a bunch of IF Nodes to check the Call.RoutingClientID and then create the right VXML Server URI based on the the related name, but all is just to account for the fact that calls originated by CUCM have the wrong value on the Call.RoutingClient variable. All this I believe can be avoided if the values on the variables were consistent.
I would like to hear some opinions from Cisco developers on this matter.

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