Query_string not returning results that is known to be in the searched fields

I have an index with data in several nested fields, that I want to build a small search engine for. Below I have my query, data example, and mapping.

I'm using highlight to display my result

If I search for "known existing phrase" I will get a search result that contains some of the words. The default_operator is OR, so that makes sense.

If I search for ""known existing phrase"", I would expect I would get this exact known existing phrase that I know is in my data, I get no hits.
If I set the default_operator to AND I also get no results

I can't figure out if it is

  1. my query that is wrong
  2. if it is highlight causing problems
  3. if it is searching in different nested fields that is the issue
  4. if I need an extra function like inner_hits

Any advice would be helpful

My query (from kibana)

GET graph_dummy_data/_search
{
  "query": {
    "query_string": {
      "query":      "known existing phrase",
      "fields":     [ "graph_title", "graph_description"
                    , "simulationer.title" , "simulationer.description"
                    , "simulationer.trace.description", "simulationer.trace.label"
                    , "simulationer.trace.guide", "simulationer.trace.purpose"],
      }
    },
    "highlight": {
      "fields": {
        "graph_title": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]},
        "graph_description": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]},
        "simulationer.title": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]},
        "simulationer.description": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]},
        "simulationer.trace.description": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]},
        "simulationer.trace.label": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]},
        "simulationer.trace.guide": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]},
        "simulationer.trace.purpose": {"pre_tags": ["<mark>"], "post_tags": ["</mark>"]}
      }
    }
  }

My data

    "_index" : "Graph dummy data",
    "_type" : "_doc",
    "_id" : "14660",
    "_score" : 1.0,
    "_source" : {
      "graph_description" : "Graph description, encoded as tekst and should be searchable",
      "response" : "OK",
      "graph_id" : "14660",
      "@timestamp" : "2020-01-31T10:04:05.034Z",
      "graph_majortimestamp" : "2020-01-17T08:59:12.0000000Z",
      "graph_title" : "Graph title, encoded as tekst and should be searchable",
      "@version" : "1",
      "simulationer" : [
        {
          "created" : "2020-01-13T11:16:18.8930000Z",
          "title" : "Simulationer title, encoded as tekst and should be searchable",
          "id" : "195213",
          "trace" : [
            {
              "guide" : "",
              "role" : "Role 1, not searchable",
              "purpose" : "Activity purpose, encoded as tekst and should be searchable",
              "id" : "Activity3_1",
              "label" : "Activity label, encoded as tekst and should be searchable",
              "description" : "Activity description, encoded as tekst and should be searchable"
            },
            {
              "guide" : "",
              "role" : "Role 1, not searchable",
              "purpose" : "Activity purpose, encoded as tekst and should be searchable",
              "id" : "Activity5",
              "label" : "Activity label, encoded as tekst and should be searchable",
              "description" : "Activity description, encoded as tekst and should be searchable"
            },
            {
              "guide" : "",
              "role" : "Role 1, not searchable",
              "purpose" : "Activity purpose, encoded as tekst and should be searchable",
              "id" : "Activity22_1",
              "label" : "Activity label, encoded as tekst and should be searchable",
              "description" : "Activity description, encoded as tekst and should be searchable"
            },
            {
              "guide" : "",
              "role" : "Role 1, not searchable",
              "purpose" : "Activity purpose, encoded as tekst and should be searchable",
              "id" : "Activity33",
              "label" : "Activity label, encoded as tekst and should be searchable",
  		  "description" : "Activity description, encoded as tekst and should be searchable"
            }
          ],
          "description" : Simulation description, encoded as tekst and should be searchable"
        },

My data's mapping

"mappings" : {
  "properties" : {
    "@timestamp" : {
      "type" : "date"
    },
    "@version" : {
      "type" : "text",
      "fields" : {
        "keyword" : {
          "type" : "keyword",
          "ignore_above" : 256
        }
      }
    },
    "graph_category" : {
      "type" : "text"
    },
    "graph_description" : {
      "type" : "text",
      "analyzer" : "danish"
    },
    "graph_id" : {
      "type" : "integer"
    },
    "graph_majortimestamp" : {
      "type" : "date"
    },
    "graph_title" : {
      "type" : "text",
      "analyzer" : "danish"
    },
    "response" : {
      "type" : "text",
      "fields" : {
        "keyword" : {
          "type" : "keyword",
          "ignore_above" : 256
        }
      }
    },
    "simulationer" : {
      "type" : "nested",
      "properties" : {
        "created" : {
          "type" : "date"
        },
        "description" : {
          "type" : "text",
          "analyzer" : "danish"
        },
        "id" : {
          "type" : "integer"
        },
        "simulation_roles" : {
          "type" : "text"
        },
        "title" : {
          "type" : "text",
          "analyzer" : "danish"
        },
        "trace" : {
          "type" : "nested",
          "properties" : {
            "description" : {
              "type" : "text",
              "analyzer" : "danish"
            },
            "guide" : {
              "type" : "text",
              "analyzer" : "danish"
            },
            "id" : {
              "type" : "text"
            },
            "label" : {
              "type" : "text",
              "analyzer" : "danish"
            },
            "purpose" : {
              "type" : "text",
              "analyzer" : "danish"
            },
            "role" : {
              "type" : "text"
            }
          }
        }
      }
    },
    "type" : {
      "type" : "text",
      "fields" : {
        "keyword" : {
          "type" : "keyword",
          "ignore_above" : 256
        }
      }
    }
  }
}
  }
}

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