nested 查询排序结果异常

es索引中的对象mapping中nested字段如下

"cates": {

    "type": "nested",

    "properties": {

        "categoryEn": {

            "type": "text",

            "fields": {

                "keyword": {

                    "ignore_above": 256,

                    "type": "keyword"

                }

            }

        },

        "cateSort": {

            "type": "long"

        }

    }

对应的查询请求如下

{

    "query": {

        "bool": {

            "must": [

                {

                    "nested": {

                        "path": "cates",

                        "query": {

                            "bool": {

                                "must": [

                                    {

                                        "match": {

                                            "cates.categoryEn": "LOCAL"

                                        }

                                    }

                                ]

                            }

                        }

                    }

                }

            ]

        }

    },

    "sort": {

        "cates.cateSort": {

            "order": "asc",

            "nested_filter": {

                "term": {

                    "categoryEn": "LOCAL"

                }

            }

        }

    },

    "_source": {

        "includes": [

            "cates",

            "id"

        ],

        "excludes": []

    }

}

 
响应结果如下:

{

    "took": 1,

    "timed_out": false,

    "_shards": {

        "total": 5,

        "successful": 5,

        "skipped": 0,

        "failed": 0

    },

    "hits": {

        "total": 4,

        "max_score": null,

        "hits": [

            {

                "_index": "ghyx_combine_index",

                "_type": "ghyx_combine_type",

                "_id": "5",

                "_score": null,

                "_source": {

                    "cates": [

                        {

                            "categoryEn": "LOCAL",

                            "cateSort": 1

                        }

                    ],

                    "id": "5"

                },

                "sort": [

                    9223372036854776000

                ]

            },

            {

                "_index": "ghyx_combine_index",

                "_type": "ghyx_combine_type",

                "_id": "4",

                "_score": null,

                "_source": {

                    "cates": [

                        {

                            "categoryEn": "LOCAL",

                            "cateSort": 7

                        }

                    ],

                    "id": "4"

                },

                "sort": [

                    9223372036854776000

                ]

            },

            {

                "_index": "ghyx_combine_index",

                "_type": "ghyx_combine_type",

                "_id": "7",

                "_score": null,

                "_source": {

                    "cates": [

                        {

                            "categoryEn": "FIRST",

                            "cateSort": 6

                        },

                        {

                            "categoryEn": "LOCAL",

                            "cateSort": 8

                        }

                    ],

                    "id": "7"

                },

                "sort": [

                    9223372036854776000

                ]

            },

            {

                "_index": "ghyx_combine_index",

                "_type": "ghyx_combine_type",

                "_id": "3",

                "_score": null,

                "_source": {

                    "cates": [

                        {

                            "categoryEn": "LOCAL",

                            "cateSort": 3

                        }

                    ],

                    "id": "3"

                },

                "sort": [

                    9223372036854776000

                ]

            }

        ]

    }

}

这个结果和预想中的 根据cates.cateSort排序,且参与的cates满足cates.categoryEn='LOCAL'不符
请问这个问题出在哪?