我正在学习elasticsearch term suggestion。以下是我的数据：

PUT test/_bulk?refresh
{"index": {"_id": "1"}}
{"text": ["elastic"]}
{"index": {"_id": "2"}}
{"text": ["elastic", "elastica"]}
{"index": {"_id": "3"}}
{"text": ["elastic", "elastica", "elasticb"]}
{"index": {"_id": "4"}}
{"text": ["elastic", "elastica", "elasticb", "elasticc"]}

字符串
以下是我的搜索：

GET /test/_search
{
  "suggest": {
    "my_suggestion": {
      "text": "elastic",
      "term": {
        "field": "text"
      }
    }
  }
}

型
结果是：

{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 1,
    "successful": 1,
    "skipped": 0,
    "failed": 0
  },
  "hits": {
    "total": {
      "value": 0,
      "relation": "eq"
    },
    "max_score": null,
    "hits": []
  },
  "suggest": {
    "my_suggestion": [
      {
        "text": "elastic",
        "offset": 0,
        "length": 7,
        "options": []
      }
    ]
  }
}

型
我知道默认的suggest_mode是missing，所以结果中不包含“elastic”。但是为什么“elastica”，“elasticb”和“elasticc”也不被建议呢？
Elasticsearch版本：8.10