Aggregations query not returning response on Elasticsearch 7.5

Hi, I am trying to run an ES query based on aggregations. It runs and returns a response in ES 2.4 but when I try to run the query in ES 7.5, it returns a response with empty buckets. Below is my query:

Elasticsearch 7.5 query

GET index_name/_search
{
     "aggs": {
            "category": {
                "nested": {
                    "path": "model.model_info"
                },
                "aggs": {
                    "tags": {
                        "terms": {
                            "field": "model.model_info.tags.raw",
                            "size": 1000
                        }
                    },
                    "sort_price_type": {
                        "terms": {
                            "field": "model.model_info.price_type",
                            "size": 100
                      }
                    }
                }
            }
     }
}

Response in Elasticsearch 7.5

{
   "took": 14,
   "timed_out": false,
   "_shards": {
      "total": 1,
      "successful": 1,
      "skipped": 0,
      "failed": 0
   },
   "hits": {
      "total": {
         "value": 0,
         "relation": "eq"
      },
      "max_score": null,
      "hits": []
   },
   "aggregations": {
      "category_data": {
         "doc_count": 0,
         "tags": {
            "doc_count_error_upper_bound": 0,
            "sum_other_doc_count": 0,
            "buckets": []
         },
         "price_type": {
            "doc_count_error_upper_bound": 0,
            "sum_other_doc_count": 0,
            "buckets": []
         }
      }
   }
}

For Elasticsearch 2.4 query works very well and looks is like this:

GET index_name/doc_type/_search
{
     "aggs": {
            "category": {
                "nested": {
                    "path": "model.model_info"
                },
                "aggs": {
                    "tags": {
                        "terms": {
                            "field": "model.model_info.tags.raw",
                            "size": 1000
                        }
                    },
                    "sort_price_type": {
                        "terms": {
                            "field": "model.model_info.price_type",
                            "size": 100
                      }
                    }
                }
            }
     }
}

I'm using the same mappings for both the queries:

"tags": map[string]interface{}{
    "type": "text",
    "fields": map[string]interface{}{
        "raw": map[string]interface{}{
	         "type":  "keyword",
	         "index": true,
         },
     },
},
"price_type": map[string]interface{}{
		"type":      "text",
		"fielddata": true,
},

Both price_type and tags are nested inside model.model_info fields.

It would be great if anyone can help me with this issue and make the queries run on both ES 2.4 and ES 7.5. I tried a lot to debug and make it work but still I'm not able to figure out my mistake. Thanks in advance :slight_smile:

It would be great if anyone can help me with issue, I'm still not able to fix it.