[CI] TextRollingUpgradeIT testIndexing {upgradedNodes=1} failing

[elasticsearchmachine]

Build Scans:

• elasticsearch-intake #28323 / 9.1.4_bwc-snapshots
• elasticsearch-pull-request #91454 / pr-upgrade-part-2

Reproduction Line:

./gradlew ":x-pack:plugin:logsdb:qa:rolling-upgrade:v9.1.4#bwcTest" -Dtests.class="org.elasticsearch.upgrades.TextRollingUpgradeIT" -Dtests.method="testIndexing {upgradedNodes=2}" -Dtests.seed=5FD761E33CEAA2AF -Dtests.bwc=true -Dtests.locale=vai-Vaii -Dtests.timezone=PLT -Druntime.java=24

Applicable branches:
main

Reproduces locally?:
N/A

Failure History:
See dashboard

Failure Message:

java.lang.AssertionError: 
Expected: "A ko ONhG GasHlMIfvsbK zvLjGex utH mGYFDxHAPKevGQ"
     but: was "A OEESA dNwRqmErnEWnBHS PZmZBSQADhMv nGnDgKyT QQalW qjmk"

Issue Reasons:

• [main] 2 failures in test testIndexing {upgradedNodes=1} (0.3% fail rate in 761 executions)

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

[elasticsearchmachine]

This has been muted on branch main

Mute Reasons:

• [main] 2 failures in test testIndexing {upgradedNodes=1} (0.3% fail rate in 761 executions)

Build Scans:

• elasticsearch-intake #28323 / 9.1.4_bwc-snapshots
• elasticsearch-pull-request #91454 / pr-upgrade-part-2

[elasticsearchmachine]

Pinging @elastic/es-storage-engine (Team:StorageEngine)