Below is the mapping for my testcase:

(new) index_2

{
  "my_polygons_2": {
    "aliases": {},
    "mappings": {
      "my_polygons_2": {
        "properties": {
          "client_id": {
            "type": "integer"
          },
          "id": {
            "type": "integer"
          },
          "name": {
            "type": "keyword"
          },
          "polygon": {
            "type": "geo_shape",
            "tree": "quadtree",
            "precision": "1.0m"
          }
        }
      }
    },
    "settings": {
      "index": {
        "number_of_shards": "5",
        "provided_name": "my_polygons_2",
        "creation_date": "1570438559736",
        "analysis": {
          "filter": {
            "addresstranslation": {
              "type": "synonym",
              "synonyms": [
                "1e,eerste",
                "2e,tweede",
                "3e,derde",
                "1ste,eerste",
                "2de,tweede",
                "3de,derde"
              ]
            },
            "translation": {
              "token_chars": [
                "letter",
                "digit",
                "whitespace"
              ],
              "min_gram": "3",
              "type": "nGram",
              "max_gram": "50"
            },
            "ngram_koperverkoper": {
              "token_chars": [
                "letter",
                "digit",
                "whitespace",
                "symbol",
                "punctuation"
              ],
              "min_gram": "1",
              "type": "ngram",
              "max_gram": "20"
            },
            "ngram_involved_ogranisations": {
              "token_chars": [
                "letter",
                "digit",
                "whitespace",
                "symbol",
                "punctuation"
              ],
              "min_gram": "1",
              "type": "ngram",
              "max_gram": "20"
            }
          },
          "analyzer": {
            "translation_index_analyzer": {
              "filter": "standard,lowercase,asciifolding,translation",
              "type": "custom",
              "tokenizer": "standard"
            },
            "autocomplete": {
              "filter": "lowercase",
              "tokenizer": "autocomplete"
            },
            "address_index_analyzer": {
              "filter": "standard,lowercase,asciifolding,addresstranslation,translation",
              "type": "custom",
              "tokenizer": "standard"
            },
            "translation_search_analyzer": {
              "filter": "standard,lowercase,asciifolding",
              "type": "custom",
              "tokenizer": "standard"
            },
            "autocomplete_koperverkoper": {
              "filter": "lowercase, ngram_koperverkoper",
              "tokenizer": "keyword"
            },
            "address_search_analyzer": {
              "filter": "standard,lowercase,asciifolding,addresstranslation",
              "type": "custom",
              "tokenizer": "standard"
            },
            "autocomplete_search": {
              "tokenizer": "lowercase"
            },
            "autocomplete_involved_organisations": {
              "filter": "lowercase, ngram_involved_ogranisations",
              "tokenizer": "standard"
            }
          },
          "tokenizer": {
            "autocomplete": {
              "token_chars": [
                "letter"
              ],
              "min_gram": "2",
              "type": "edge_ngram",
              "max_gram": "10"
            }
          }
        },
        "number_of_replicas": "0",
        "uuid": "l8nFFMgvQzGDvGHDdYSTkQ",
        "version": {
          "created": "5061199"
        }
      }
    }
  }
}



original index_1
{
  "my_polygons_1": {
    "aliases": {},
    "mappings": {
      "my_polygons_1": {
        "properties": {
          "client_id": {
            "type": "integer"
          },
          "id": {
            "type": "integer"
          },
          "name": {
            "type": "keyword"
          },
          "polygon": {
            "type": "geo_shape",
            "tree": "quadtree",
            "precision": "1.0m"
          }
        }
      }
    },
    "settings": {
      "index": {
        "number_of_shards": "5",
        "provided_name": "my_polygons_1",
        "creation_date": "1570023486672",
        "analysis": {
          "filter": {
            "addresstranslation": {
              "type": "synonym",
              "synonyms": [
                "1e,eerste",
                "2e,tweede",
                "3e,derde",
                "1ste,eerste",
                "2de,tweede",
                "3de,derde"
              ]
            },
            "translation": {
              "token_chars": [
                "letter",
                "digit",
                "whitespace"
              ],
              "min_gram": "3",
              "type": "nGram",
              "max_gram": "50"
            },
            "ngram_koperverkoper": {
              "token_chars": [
                "letter",
                "digit",
                "whitespace",
                "symbol",
                "punctuation"
              ],
              "min_gram": "1",
              "type": "ngram",
              "max_gram": "20"
            },
            "ngram_involved_ogranisations": {
              "token_chars": [
                "letter",
                "digit",
                "whitespace",
                "symbol",
                "punctuation"
              ],
              "min_gram": "1",
              "type": "ngram",
              "max_gram": "20"
            }
          },
          "analyzer": {
            "translation_index_analyzer": {
              "filter": "standard,lowercase,asciifolding,translation",
              "type": "custom",
              "tokenizer": "standard"
            },
            "autocomplete": {
              "filter": "lowercase",
              "tokenizer": "autocomplete"
            },
            "address_index_analyzer": {
              "filter": "standard,lowercase,asciifolding,addresstranslation,translation",
              "type": "custom",
              "tokenizer": "standard"
            },
            "translation_search_analyzer": {
              "filter": "standard,lowercase,asciifolding",
              "type": "custom",
              "tokenizer": "standard"
            },
            "autocomplete_koperverkoper": {
              "filter": "lowercase, ngram_koperverkoper",
              "tokenizer": "keyword"
            },
            "address_search_analyzer": {
              "filter": "standard,lowercase,asciifolding,addresstranslation",
              "type": "custom",
              "tokenizer": "standard"
            },
            "autocomplete_search": {
              "tokenizer": "lowercase"
            },
            "autocomplete_involved_organisations": {
              "filter": "lowercase, ngram_involved_ogranisations",
              "tokenizer": "standard"
            }
          },
          "tokenizer": {
            "autocomplete": {
              "token_chars": [
                "letter"
              ],
              "min_gram": "2",
              "type": "edge_ngram",
              "max_gram": "10"
            }
          }
        },
        "number_of_replicas": "0",
        "uuid": "8t-0_4GKSnSvHCfdtj2Q5A",
        "version": {
          "created": "5061199"
        }
      }
    }
  }
}