[CI] TransportSearchActionTests.testShouldMinimizeRoundtrips fails

[cbuescher]

https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+intake/2539/consoleFull

./gradlew :server:unitTest \
  -Dtests.seed=2C6745DCDAD6C839 \
  -Dtests.class=org.elasticsearch.action.search.TransportSearchActionTests \
  -Dtests.method="testShouldMinimizeRoundtrips" \
  -Dtests.security.manager=true \
  -Dtests.locale=en-IN \
  -Dtests.timezone=Asia/Kuwait \
  -Dcompiler.java=11 \
  -Druntime.java=8

15:15:36 FAILURE 0.09s J4 | TransportSearchActionTests.testShouldMinimizeRoundtrips <<< FAILURES!
15:15:36    > Throwable #1: java.lang.AssertionError
15:15:36    > 	at __randomizedtesting.SeedInfo.seed([2C6745DCDAD6C839:134BBC3FB044E379]:0)
15:15:36    > 	at org.elasticsearch.action.search.TransportSearchActionTests.testShouldMinimizeRoundtrips(TransportSearchActionTests.java:833)
15:15:36    > 	at java.lang.Thread.run(Thread.java:748)

[elasticmachine]

Pinging @elastic/es-search