Problem with Grafana and annotations via Elasticsearch

ES_index.json

{
  "event" : {
    "aliases" : { },
    "mappings" : {
      "events" : {
        "properties" : {
          "@timestamp" : {
            "type" : "date",
            "format" : "strict_date_optional_time||epoch_millis"
          },
          "environment" : {
            "type" : "string"
          },
          "project" : {
            "type" : "string"
          },
          "tags" : {
            "type" : "string"
          },
          "text" : {
            "type" : "string"
          },
          "title" : {
            "type" : "string"
          }
        }
      }
    },
    "settings" : {
      "index" : {
        "creation_date" : "1485258231637",
        "number_of_shards" : "5",
        "number_of_replicas" : "2",
        "uuid" : "ujMtDugtTlm72Zy7y2WU1A",
        "version" : {
          "created" : "2040399"
        }
      }
    },
    "warmers" : { }
  }
}

example_document.json

   "hits" : [ {
      "_index" : "event",
      "_type" : "events",
      "_id" : "AVnQTAi8Oa0dfoHFpfQe",
      "_score" : 1.0,
      "_source" : {
        "project" : "shorty",
        "environment" : "shorty-prod",
        "title" : "Shorty testet",
        "tags" : [ "eins", "drei" ],
        "text" : "Shorty bastelt noch immer herum",
        "@timestamp" : "1485258335599"
      }
     
# "tags" is an array

Grafana_ES_query.json

# grabbed it from tcpdump
{"search_type":"query_then_fetch","ignore_unavailable":true,"index":"event"}
{"query":{"bool":{"must":[{"range":{"@timestamp":{"from":1485239454989,"to":1485261054989,"format":"epoch_millis"}}},{"query_string":{"query":"*"}}]}},"size":10000}

# mappings:
# Time: @timestamp
# Title: title
# Tags: tags
# Text: text