[CI] FieldExtractorIT testIntFieldWithTextOrKeywordSubfieldMalformed failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #8713 / 8.13.4_bwc
• elasticsearch-periodic #8707 / 8.12.2_bwc

Reproduction Line:

./gradlew ":x-pack:plugin:esql:qa:server:mixed-cluster:v8.13.4#javaRestTest" -Dtests.class="org.elasticsearch.xpack.esql.qa.mixed.FieldExtractorIT" -Dtests.method="testIpFieldWithTextOrKeywordSubfieldMalformed" -Dtests.seed=75E857AFD3000CF2 -Dtests.bwc=true -Dtests.locale=eu -Dtests.timezone=Pacific/Pohnpei -Druntime.java=24

Applicable branches:
8.19

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Expected a map containing
columns: a list containing
        0: a map containing
       type: "ip"
       name: "ip_field"
        1: a map containing
       type: "keyword"
       name: "ip_field.str"
 values: a list containing
        0: a list containing
          0: null
          1: expected "wISRA" but was null

Issue Reasons:

• [8.19] 2 failures in test testIntFieldWithTextOrKeywordSubfieldMalformed (1.4% fail rate in 146 executions)
• [8.19] 2 failures in pipeline elasticsearch-periodic (50.0% fail rate in 4 executions)

Note:
This issue was created using new test triage automation. Please report issues or feedback to es-delivery.

[elasticsearchmachine]

Pinging @elastic/es-analytical-engine (Team:Analytics)