ES query with top level inner hits that works

gistfile1.txt

{
  "query" : {
    "bool" : {
      "must" : [{
          "nested" : {
            "path" : "a.b.c.d.first",
            "query" : {
              "nested" : {
                "path" : "a.b.c.d.first.e.f.second",
                "query" : {
                  "bool" : {
                    "filter" : [{
                        "term" : {
                          "a.b.c.d.first.e.f.second.message" : "Nobody expects the Spanish inquisition!"
                        }
                      }
                    ]
                  }
                }
              }
            }
          }
        }
      ]
    }
  },
  "inner_hits" : {
    "kids0" : {
      "path" : {
        "a.b.c.d.first" : {
          "query" : {
            "nested" : {
              "path" : "a.b.c.d.first.e.f.second" :
              "query" : {
                "bool" : {
                  "filter" : [{
                      "prefix" : {
                        "a.b.c.d.first.e.f.second.message" : "Nobody expects the Spanish inquisition!"
                      }
                    }
                  ]
                }
              }
            }
          },
          "size" : 1,
          "_source" : false,
          "inner_hits" : {
            "kids0" : {
              "path" : {
                "a.b.c.d.first.e.f.second" : {
                  "size" : 1,
                  "_source" : [
                    "message",
                    "bla",
                    "blub"
                  ],
                  "query" : {
                    "bool" : {
                      "filter" : [{
                          "term" : {
                            "a.b.c.d.first.e.f.second.message" : "Nobody expects the Spanish inquisition!"
                          }
                        }
                      ]
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}