Problem with put displayname field to elastic index on Arches 7.5.3

[cube13]

Problem Description:

I use Arches 7.5.3
I use this request to create an object

curl -X PUT "https://arches.example.gov/resources/h0001/OBJECT_ID" \
-H "Content-Type: application/x-www-form-urlencoded" \
-H "Authorization: Bearer YOUR_BEARER_TOKEN" \
-d '{
      "@id": "http://localhost:8000/resources/OBJECT_ID",
      "@type": "https://example.gov/ontologies/heritage/ImmovableHeritageObject",
      "http://heritage.example/ontology/hed/R1i_has_projection": [
        {
          "http://www.cidoc-crm.org/cidoc-crm/P1_is_identified_by": [
            {
              "@id": "http://localhost:8000/tile/4e68887b3d6-d5ce-4462-b6b3-8117049c6e64/node/f9ab11cd-2ebd-11ee-9f50-b19f423426e4",
              "@type": "https://example.gov/ontologies/heritage/ObjectAppellation",
              "https://example.gov/ontologies/heritage/has_value": {
                "@language": "uk",
                "@value": "Created object for test"
              }
            }
          ]
        }
      ],
      "http://heritage.example/ontology/hed/R102_has_guid": "095aefe2-1dcf-440b-8b6a-931a28530a96"
    }'

After successfully creating the object, I search for the object by model and name in Arches Elastic Search

curl -X GET "http://elastic_url:9200/arches_resources/_search?pretty=true" \
-H "Content-Type: application/json" \
-d '{
   "query": {
     "nested": {
       "path": "strings",
       "query": {
         "bool": {
           "must": [
             {
               "match": {
                 "strings.string": {
                   "query": "Created object for test",
                   "operator": "and"
                 }
               }
             }
           ]
         }
       },
       "inner_hits": {}
     }
   }
 }'

I get a response from Elastic that it finds my object with the name 'Created object for test' but the displayname field is empty

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 1,
    "successful" : 1,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : {
      "value" : 1,
      "relation" : "eq"
    },
    "max_score" : 42.55066,
    "hits" : [
      {
        "_index" : "arches_resources",
        "_id" : "095aefe2-1dcf-440b-8b6a-931a28530a96",
        "_score" : 42.55066,
        "_source" : {
          "date_ranges" : [ ],
          "dates" : [ ],
          "displaydescription" : [ ],
          **"displayname" : [ ],**
          "domains" : [ ],
          "geometries" : [ ],
          "graph_id" : "6460104f-6027-420e-8854-eac1d8b4a5bf",
          "ids" : [ ],
          "legacyid" : null,
          "map_popup" : [ ],
          "numbers" : [ ],
          "permissions" : {
            "users_with_no_access" : [ ],
            "users_without_delete_perm" : [ ],
            "users_without_edit_perm" : [ ],
            "users_without_read_perm" : [ ]
          },
          "points" : [ ],
          "provisional_resource" : "false",
          "resourceinstanceid" : "095aefe2-1dcf-440b-8b6a-931a28530a96",
          "root_ontology_class" : "https://example.gov/ontologies/heritage/ImmovableHeritageObject",
          "strings" : [
            {
              "language" : "uk",
              "nodegroup_id" : "d64e8bda-3fe0-11ee-96b2-77bdb42acc90",
              "provisional" : false,
              "string" : "095aefe2-1dcf-440b-8b6a-931a28530a96"
            },
            {
              "language" : "uk",
              "nodegroup_id" : "f9ab11cd-2ebd-11ee-9f50-b19f423426e4",
              "provisional" : false,
              "string" : "Created object for test"
            }
          ],
          "tiles" : [
            {
              "data" : {
                "d64e8bda-3fe0-11ee-96b2-77bdb42acc90" : {
                  "uk" : {
                    "direction" : "ltr",
                    "value" : "095aefe2-1dcf-440b-8b6a-931a28530a96"
                  }
                }
              },
              "nodegroup_id" : "d64e8bda-3fe0-11ee-96b2-77bdb42acc90",
              "parenttile_id" : null,
              "provisionaledits" : null,
              "resourceinstance_id" : "095aefe2-1dcf-440b-8b6a-931a28530a96",
              "sortorder" : 0,
              "tileid" : "f4a8ac12-aa4a-45ed-8da1-ff96051cba1b"
            },
            {
              "data" : { },
              "nodegroup_id" : "574be64a-2ebd-11ee-9f50-b19f423426e4",
              "parenttile_id" : null,
              "provisionaledits" : null,
              "resourceinstance_id" : "095aefe2-1dcf-440b-8b6a-931a28530a96",
              "sortorder" : 0,
              "tileid" : "4ea60370-e3f7-467a-9049-3472f0112946"
            },
            {
              "data" : {
                "f9ab11cf-2ebd-11ee-9f50-b19f423426e4" : {
                  "uk" : {
                    "direction" : "ltr",
                    "value" : "Created object for test"
                  }
                }
              },
              "nodegroup_id" : "f9ab11cd-2ebd-11ee-9f50-b19f423426e4",
              "parenttile_id" : "4ea60370-e3f7-467a-9049-3472f0112946",
              "provisionaledits" : null,
              "resourceinstance_id" : "095aefe2-1dcf-440b-8b6a-931a28530a96",
              "sortorder" : 0,
              "tileid" : "803f7363-90ef-4640-ac50-7c43b5234a4f"
            }
          ]
        },
        "inner_hits" : {
          "strings" : {
            "hits" : {
              "total" : {
                "value" : 1,
                "relation" : "eq"
              },
              "max_score" : 42.55066,
              "hits" : [
                {
                  "_index" : "arches_resources",
                  "_id" : "095aefe2-1dcf-440b-8b6a-931a28530a96",
                  "_nested" : {
                    "field" : "strings",
                    "offset" : 1
                  },
                  "_score" : 42.55066,
                  "_source" : {
                    "language" : "uk",
                    "nodegroup_id" : "f9ab11cd-2ebd-11ee-9f50-b19f423426e4",
                    "provisional" : false,
                    "string" : "Created object for test"
                  }
                }
              ]
            }
          }
        }
      }
    ]
  }
}

If I reindex Elastic using the command python manage.py es reindex_database, the object's name appears in the field.