Webservice dashboard link to kibana slow rails requests broken

Impact:

This is impacting SREs ability to diagnose apdex alerts on rails webservices (api, web).

Problem:

On the web dashboard the link to rails slow requests:

Is broken. It links to this kibana query, which includes a filter:

{
  "bool": {
    "minimum_should_match": 1,
    "should": [
      {
        "script": {
          "script": {
            "source": "doc['json.duration_s'].value > doc['json.target_duration_s'].value"
          }
        }
      }
    ]
  }
}

Error:

This filter is making the query fail with error.

[1:3425] unknown field [0]

{
  "error": {
    "root_cause": [
      {
        "type": "parsing_exception",
        "reason": "unknown query [0]",
        "line": 1,
        "col": 3425
      }
    ],
    "type": "x_content_parse_exception",
    "reason": "[1:3425] [bool] failed to parse field [filter]",
    "caused_by": {
      "type": "parsing_exception",
      "reason": "unknown query [0]",
      "line": 1,
      "col": 3425,
      "caused_by": {
        "type": "named_object_not_found_exception",
        "reason": "[1:3425] unknown field [0]"
      }
    }
  }
}