[CI] SearchProgressActionListenerIT testSearchProgressWithHits failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-periodic #6011 / openjdk17_checkpart1_java-fips-matrix
• elasticsearch-periodic #6011 / openjdk21_checkpart1_java-matrix
• elasticsearch-periodic #5975 / openjdk23_checkpart1_java-matrix
• elasticsearch-periodic-platform-support #5960 / oraclelinux-9_platform-support-unix
• elasticsearch-periodic-platform-support #5945 / rocky-9_platform-support-unix

Reproduction Line:

./gradlew ":server:internalClusterTest" --tests "org.elasticsearch.action.search.SearchProgressActionListenerIT.testSearchProgressWithHits" -Dtests.seed=19DAE45F5A2D0517 -Dtests.locale=os-Cyrl-GE -Dtests.timezone=Africa/Bamako -Druntime.java=17 -Dtests.fips.enabled=true

Applicable branches:
8.x

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: 
Expected: <20>
     but: was <10>

Issue Reasons:

• [8.x] 2 consecutive failures in test testSearchProgressWithHits
• [8.x] 5 failures in test testSearchProgressWithHits (1.0% fail rate in 521 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic (16.7% fail rate in 12 executions)
• [8.x] 2 failures in pipeline elasticsearch-periodic-platform-support (18.2% fail rate in 11 executions)

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

[elasticsearchmachine]

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

[elasticsearchmachine]

Pinging @elastic/es-search-foundations (Team:Search Foundations)

[elasticsearchmachine]

This has been muted on branch main

Mute Reasons:

• [main] 2 failures in test testSearchProgressWithHits (0.7% fail rate in 302 executions)
• [main] 2 failures in step part1 (5.1% fail rate in 39 executions)
• [main] 2 failures in pipeline elasticsearch-intake (5.1% fail rate in 39 executions)

Build Scans:

• elasticsearch-intake #16329 / part1
• elasticsearch-intake #16227 / part1