Problem with multiple range filters

Elastic Stack Elasticsearch
1

I don't know if there is something wrong with my syntax but Elastic doesn't reply with an error code.

I have made a query that is like this:

{
    "query": {"query_string": {"query": "*"}},
    "filter": {
        "and": [
            {"range":
                 {"field_1": {"gte": X},
                   "field_2": {"lte": Y}
                 }
            }
        ]
    } 
}

This doen't raise any problem but the results doesn't make sense. There are documents that fulfill the filter criteria but none is shown.

When I perform the query this way:

{
    "query": {"query_string": {"query": "*"}},
    "filter": {
        "and": [
            {"range": {"field_1": {"gte": X}}},
            {"range": {"field_2": {"lte": Y}}},
        ]
    } 
}

I don't see the problem because for some indexes the first query works fine.