**Build scan:**
https://gradle-enterprise.elastic.co/s/iadxmj2uistr2/tests/:server:test/org.elasticsearch.index.mapper.IdLoaderTests/testSynthesizeIdMultipleSegments
**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.index.mapper.IdLoaderTests.testSynthesizeIdMultipleSegments" -Dtests.seed=FAA252A68EA9FBE6 -Dtests.locale=bg -Dtests.timezone=America/Argentina/La_Rioja -Druntime.java=21
```

**Applicable branches:**
main

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.index.mapper.IdLoaderTests&tests.test=testSynthesizeIdMultipleSegments
**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: a collection with size <3>
     but: collection size was <4>

  at __randomizedtesting.SeedInfo.seed([FAA252A68EA9FBE6:54C3DB174C535E9C]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.junit.Assert.assertThat(Assert.java:956)
  at org.junit.Assert.assertThat(Assert.java:923)
  at org.elasticsearch.index.mapper.IdLoaderTests.lambda$testSynthesizeIdMultipleSegments$3(IdLoaderTests.java:111)
  at org.elasticsearch.index.mapper.IdLoaderTests.prepareIndexReader(IdLoaderTests.java:219)
  at org.elasticsearch.index.mapper.IdLoaderTests.testSynthesizeIdMultipleSegments(IdLoaderTests.java:141)
  at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
  at java.lang.reflect.Method.invoke(Method.java:580)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.invoke(RandomizedRunner.java:1758)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$8.evaluate(RandomizedRunner.java:946)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$9.evaluate(RandomizedRunner.java:982)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$10.evaluate(RandomizedRunner.java:996)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleSetupTeardownChained$1.evaluate(TestRuleSetupTeardownChained.java:48)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleThreadAndTestName$1.evaluate(TestRuleThreadAndTestName.java:45)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:843)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:490)
  at com.carrotsearch.randomizedtesting.RandomizedRunner.runSingleTest(RandomizedRunner.java:955)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$5.evaluate(RandomizedRunner.java:840)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$6.evaluate(RandomizedRunner.java:891)
  at com.carrotsearch.randomizedtesting.RandomizedRunner$7.evaluate(RandomizedRunner.java:902)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleStoreClassName$1.evaluate(TestRuleStoreClassName.java:38)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.NoShadowingOrOverridesOnMethodsRule$1.evaluate(NoShadowingOrOverridesOnMethodsRule.java:40)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at org.apache.lucene.tests.util.TestRuleAssertionsRequired$1.evaluate(TestRuleAssertionsRequired.java:53)
  at org.apache.lucene.tests.util.AbstractBeforeAfterRule$1.evaluate(AbstractBeforeAfterRule.java:43)
  at org.apache.lucene.tests.util.TestRuleMarkFailure$1.evaluate(TestRuleMarkFailure.java:44)
  at org.apache.lucene.tests.util.TestRuleIgnoreAfterMaxFailures$1.evaluate(TestRuleIgnoreAfterMaxFailures.java:60)
  at org.apache.lucene.tests.util.TestRuleIgnoreTestSuites$1.evaluate(TestRuleIgnoreTestSuites.java:47)
  at com.carrotsearch.randomizedtesting.rules.StatementAdapter.evaluate(StatementAdapter.java:36)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$StatementRunner.run(ThreadLeakControl.java:390)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:850)
  at java.lang.Thread.run(Thread.java:1583)

```
server/src/test/java/org/elasticsearch/index/mapper/IdLoaderTests.java
String actualId = leaf.getId(i);
                assertTrue("docId=" + i + " id=" + actualId, expectedIDs.remove(actualId));
            }
        };
        prepareIndexReader(indexAndForceMerge(routing, randomDocs), verify, false);
        assertThat(expectedIDs, empty());
    }
    private static CheckedConsumer<RandomIndexWriter, IOException> indexAndForceMerge(
        IndexRouting.ExtractFromSource routing,
        List<Doc> docs
    ) {
        return writer -> {
            for (Doc doc : docs) {
                indexDoc(routing, writer, doc);
            }
            writer.forceMerge(1);
        };
    }
    private void prepareIndexReader(
        CheckedConsumer<RandomIndexWriter, IOException> buildIndex,
        CheckedConsumer<IndexReader, IOException> verify,
        boolean noMergePolicy
    ) throws IOException {
        try (Directory directory = newDirectory()) {
            IndexWriterConfig config = LuceneTestCase.newIndexWriterConfig(random(), new MockAnalyzer(random()));
            if (noMergePolicy) {
                config.setMergePolicy(NoMergePolicy.INSTANCE);
            }
            Sort sort = new Sort(
                new SortField(TimeSeriesIdFieldMapper.NAME, SortField.Type.STRING, false),