Opendistro KNN score giving different scores on the same query vector

Plugins k-NN
3

@jmazane Please find the information here:

Index mapping(sharing the part comprising embedding) :

{
  "ads_knn_id0" : {
    "mappings" : {
      "_routing" : {
        "required" : true
      },
      .......
        "dailybudget" : {
          "type" : "long"
        },
        "embedding" : {
          "type" : "knn_vector",
          "doc_values" : false,
          "dimension" : 2
        },
        "endtime" : {
          "type" : "long"
        },
       ........
      }
    }
  }
}

Setting:

{
  "ads_knn_id0" : {
    "settings" : {
      "index" : {
        "refresh_interval" : "30s",
        "number_of_shards" : "1",
        "provided_name" : "ads_knn_id0",
        "knn.space_type" : "cosinesimil",
        "max_result_window" : "50000",
        "knn" : "true",
        "creation_date" : "1601612336217",
        "analysis" : {
          "analyzer" : {
            "shopee_analyzer" : {
              "filter" : [
                "lowercase"
              ],
              "tokenizer" : "whitespace"
            }
          }
        },
        "number_of_replicas" : "1",
        "queries" : {
          "cache" : {
            "enabled" : "true"
          }
        },
        "uuid" : "PVZTn2tpTlGO3oHv2BDedA",
        "version" : {
          "created" : "7080099"
        }
      }
    }
  }
}

ODFE artifact type:

{
  "name" : "node-10-130-239-193",
  "cluster_name" : "ads-semantic-recall",
  "cluster_uuid" : "dAXZDHWDRAewTAALD5CBQA",
  "version" : {
    "number" : "7.8.0",
    "build_flavor" : "oss",
    "build_type" : "deb",
    "build_hash" : "757314695644ea9a1dc2fecd26d1a43856725e65",
    "build_date" : "2020-06-14T19:35:50.234439Z",
    "build_snapshot" : false,
    "lucene_version" : "8.5.1",
    "minimum_wire_compatibility_version" : "6.8.0",
    "minimum_index_compatibility_version" : "6.0.0-beta1"
  },
  "tagline" : "You Know, for Search"
}

Number of nodes: 5