Indexing nested documents and URPs

I testing some functionality of indexing nested child documents and It looks like the custom URPs does not apply to child documents and Solr  use build-in update request processor chain to processing childs.

Configs and data to reproduce the issue  in the attachment.

When sending data to Solr:

{{curl --data-binary @nested.json -H 'Content-type:application/json' 'http://localhost:8983/solr/nesttest/update?commit=true'}}

{{{}}
  "responseHeader":{
    "status":400,
    "QTime":1},
  "error":{
    "metadata":[
      "error-class","org.apache.solr.common.SolrException",
      "root-error-class","org.apache.solr.common.SolrException"],
    "msg":"ERROR: [doc=doc1c1c1] Error adding field 'date'='2015-10-02T14:52:37' msg=Invalid Date String:'2015-10-02T14:52:37'",
    "code":400}}

If remove child from data, dates fields recognized with configured templates correctly. If added to date field value in children 'Z' char it again work.