Date Range query not working

Elastic Stack Elasticsearch
1

Hi,

I've tried a lot of different things and I'm almost giving up. I just cannot make date range queries work. I'm using parent-child mapping.

This is my mapping: https://gist.github.com/hgfischer/2fcdc3ed83cfb4b56e3f7afc34337633

The relevant part of the mapping is:

{
  "date_template": {
    "match": "*_date",
    "mapping": {
      "type": "date"
    }
  }
},

I'm storing documents with fields like:

  "timeuuid_date": 1473178784273,
  "timestamp_date": "2016-09-07T05:49:54.706Z",

And I'm trying queries with date ranges:

POST /index-name/parent-type
{
  "timeout": "60s",
  "query": {
    "bool": {
      "must": [
        {
          "has_child": {
            "type": "event",
            "min_children": 2,
            "inner_hits": {},
            "query": {
              "bool": {
                "must": [
                  {
                    "match": {
                      "attribute": "some value"
                    }
                  }
                ]
              }
            }
          }
        },
        {
          "range": {
            "timeuuid_date": {
              "lte": "now-2d"
            }
          }
        }
      ]
    }
  }
}

And I get no results. If I remove the date range part, I get results.

I've checked the index mapping, and it looks correct:

GET /index-name
...
          "timestamp_date": {
            "type": "date",
            "format": "strict_date_optional_time||epoch_millis"
          },
          "timeuuid_date": {
            "type": "date",
            "format": "strict_date_optional_time||epoch_millis"
          },
...

What am I doing wrong?