Property Transfer tool breakes my request

I use SoapUI 5.1.2 Build Date: 20150305-1358

In my test case I have Property transfer step using JSONPath. It takes property value from response of one step and puts in request of another step. When I perform Property transfer step, it breakes the structure of request, where it should input property.

I use the following JSONPath

$.data.params.id

Before Property transfer step I have request:

{ "req": "_BACKEND_ACTION_",   "to": "yiibackend",
   "data":    {
      "switch": "CUSTOMER_GET",
      "params": {"id": 8289}
   }
}

When I perform Property transfer step I got:

{
   "to": "yiibackend",
   "data":    {
      "switch": "CUSTOMER_GET",
      "params": {"id": 8289}
   },
   "req": "_BACKEND_ACTION_"
}