**Build scan:**
https://gradle-enterprise.elastic.co/s/hslc2h23uesew/tests/:server:test/org.elasticsearch.index.mapper.IdLoaderTests/testSynthesizeIdMultipleSegments

**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.index.mapper.IdLoaderTests.testSynthesizeIdMultipleSegments" -Dtests.seed=2D860B4EFDAAD918 -Dtests.locale=et-EE -Dtests.timezone=Africa/Addis_Ababa -Druntime.java=20
```

**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 <1>

  at __randomizedtesting.SeedInfo.seed([2D860B4EFDAAD918:83E782FF3F507C62]: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:110)
  at org.elasticsearch.index.mapper.IdLoaderTests.prepareIndexReader(IdLoaderTests.java:214)
  at org.elasticsearch.index.mapper.IdLoaderTests.testSynthesizeIdMultipleSegments(IdLoaderTests.java:140)
  at jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
  at java.lang.reflect.Method.invoke(Method.java:578)
  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:1623)

```
server/src/test/java/org/elasticsearch/index/mapper/IdLoaderTests.java
var routing = createRouting(routingPaths);
        var idLoader = IdLoader.createTsIdLoader(routing, routingPaths);
        long startTime = DateFieldMapper.DEFAULT_DATE_TIME_FORMATTER.parseMillis("2023-01-01T00:00:00Z");
        List<Doc> docs = List.of(
            new Doc(startTime, List.of(new Dimension("dim1", "aaa"), new Dimension("dim2", "xxx"))),
            new Doc(startTime + 1, List.of(new Dimension("dim1", "aaa"), new Dimension("dim2", "yyy"))),
            new Doc(startTime + 2, List.of(new Dimension("dim1", "bbb"), new Dimension("dim2", "xxx")))
        );
        CheckedConsumer<IndexReader, IOException> verify = indexReader -> {
            assertThat(indexReader.leaves(), hasSize(1));
            LeafReader leafReader = indexReader.leaves().get(0).reader();
            assertThat(leafReader.numDocs(), equalTo(3));
            var leaf = idLoader.leaf(null, leafReader, new int[] { 0, 1, 2 });
            assertThat(leaf.getId(0), equalTo(expectedId(routing, docs.get(0))));
            assertThat(leaf.getId(1), equalTo(expectedId(routing, docs.get(1))));
            assertThat(leaf.getId(2), equalTo(expectedId(routing, docs.get(2))));
        };
        prepareIndexReader(indexAndForceMerge(routing, docs), verify);
    }
    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/98865")
    public void testSynthesizeIdMultipleSegments() throws Exception {
        var routingPaths = List.of("dim1");
        var routing = createRouting(routingPaths);
        var idLoader = IdLoader.createTsIdLoader(routing, routingPaths);
        long startTime = DateFieldMapper.DEFAULT_DATE_TIME_FORMATTER.parseMillis("2023-01-01T00:00:00Z");
        List<Doc> docs1 = List.of(
            new Doc(startTime, List.of(new Dimension("dim1", "aaa"), new Dimension("dim2", "xxx"))),
            new Doc(startTime - 1, List.of(new Dimension("dim1", "aaa"), new Dimension("dim2", "xxx"))),
            new Doc(startTime - 2, List.of(new Dimension("dim1", "aaa"), new Dimension("dim2", "xxx"))),
            new Doc(startTime - 3, List.of(new Dimension("dim1", "aaa"), new Dimension("dim2", "xxx")))