[CI] XPackRestIT test {p0=ml/sparse_vector_search/Test sparse_vector search with query vector and pruning config} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic-platform-support #11027 / windows-2022_checkpart3_platform-support-windows
• elasticsearch-periodic #11024 / encryption-at-rest

Reproduction Line:

gradlew ":x-pack:plugin:yamlRestTest" --tests "org.elasticsearch.xpack.test.rest.XPackRestIT.test {p0=ml/sparse_vector_search/Test sparse_vector search with query vector and pruning config}" -Dtests.seed=9BD01FF6284E94F6 -Dtests.locale=shi-Latn-MA -Dtests.timezone=Indian/Comoro -Druntime.java=25

Applicable branches:
9.1

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: Failure at [ml/sparse_vector_search:263]: 
Expected: <3>
     but: was <4>

Issue Reasons:

• [9.1] 2 failures in test test {p0=ml/sparse_vector_search/Test sparse_vector search with query vector and pruning config} (1.7% fail rate in 118 executions)

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

[elasticsearchmachine]

Pinging @elastic/es-search-relevance (Team:Search Relevance)