Named Filters missing matched_filters

Request.json

POST http://127.0.0.1:9200/nest_test_data-6612/elasticsearchprojects/_search?pretty=true HTTP/1.1
Accept: application/json
Content-Type: application/json
Host: 127.0.0.1:9200
Content-Length: 429
Expect: 100-continue

{
  "from": 0,
  "size": 10,
  "filter": {
    "bool": {
      "should": [
        {
          "terms": {
            "name.sort": [
              "em-elasticsearch"
            ],
            "_name": "myfilter"
          }
        },
        {
          "terms": {
            "name.sort": [
              "nest"
            ],
            "_name": "myfilter2"
          }
        }
      ]
    }
  }
}

Response.json

HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Content-Length: 3987

{
  "took" : 3,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "failed" : 0
  },
  "hits" : {
    "total" : 2,
    "max_score" : 1.0,
    "hits" : [ {
      "_index" : "nest_test_data-6612",
      "_type" : "elasticsearchprojects",
      "_id" : "0",
      "_score" : 1.0, "_source" : {"id":0,"name":"em-elasticsearch" }
    }, {
      "_index" : "nest_test_data-6612",
      "_type" : "elasticsearchprojects",
      "_id" : "7",
      "_score" : 1.0, "_source" : {"id":7,"name":"em-elasticsearch" }
    } ]
  }
}