Elastic search (Spring data elastic search)- Date filter(range) not working as expected

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2

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I edited your post.

I'm a bit confused by:

{
  "bool" : {
    "must" : {
      "match_all" : { }
    }
  }
},
{
  "range" : {
    "timestamp" : {
      "from" : "13/06/2017 10:20",
      "to" : "18/06/2017 15:30",
      "format" : "dd/MM/yyyy HH:mm",
      "include_lower" : true,
      "include_upper" : true
    }
  }
}

It's "pseudocode" or what? I mean that the query DSL looks wrong here.
The range part should be within a filter clause which we don't see here.

Could you reproduce with a simple script what you see (outside the context of Spring) just by using Kibana REST Console? Then we can start to iterate from there.