ip_range ipv4 to ipv6 term query unexpected results

[DanielBrown2023]

Elasticsearch Version

8.17.1

Installed Plugins

No response

Java Version

bundled

OS Version

Elastic Cloud

Problem Description

Term query of ip_range type field does not return expected documents.

When docs ip_range field contains "{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:0:ffff:ffff" }}" or smaller "lte" values consisting of ipv6 strings, terms queries will not match a ipv4 string even when the value is in the range of the ip_range field.

# Bug Edge cases
PUT _index_template/ip_range_index
{
    "index_patterns": ["ip_range_index"],
    "template": {
        "mappings": {
            "properties": {
                "ip_range": {
                    "type": "ip_range"
                }
            }
        }
    }
}
POST _bulk
{ "index" : { "_index" : "ip_range_index", "_id" : "1" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "2" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:ffff:ffff:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "3" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:ffff:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "4" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "5" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "6" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "7" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:0:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "8" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:0:0:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "9" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:0:0:0" }}

# query returns 9 hits as expected
GET ip_range_index/_search
{
    "query": {
        "term": {
          "ip_range": {
            "value": "::0"
          }
        }
    }
}

# query returns 6 hits, should be 9? 
GET ip_range_index/_search
{
    "query": {
        "term": {
          "ip_range": {
            "value": "0.0.0.0"
          }
        }
    }
}

Expectation would be to have both the IPv4 and IPv6 version of this query return all 9 documents

Steps to Reproduce

# Bug Edge cases
PUT _index_template/ip_range_index
{
    "index_patterns": ["ip_range_index"],
    "template": {
        "mappings": {
            "properties": {
                "ip_range": {
                    "type": "ip_range"
                }
            }
        }
    }
}
POST _bulk
{ "index" : { "_index" : "ip_range_index", "_id" : "1" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "2" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:ffff:ffff:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "3" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:ffff:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "4" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:ffff:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "5" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:ffff:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "6" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:ffff:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "7" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:0:ffff:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "8" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:0:0:ffff" }}
{ "index" : { "_index" : "ip_range_index", "_id" : "9" } }
{"ip_range": { "gte": "0:0:0:0:0:0:0:0", "lte": "0:0:0:0:0:0:0:0" }}

# query returns 9 hits as expected
GET ip_range_index/_search
{
    "query": {
        "term": {
          "ip_range": {
            "value": "::0"
          }
        }
    }
}

# query returns 6 hits, should be 9? 
GET ip_range_index/_search
{
    "query": {
        "term": {
          "ip_range": {
            "value": "0.0.0.0"
          }
        }
    }
}

Logs (if relevant)

No response

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