It looks like this failed on the commit which claimed to fix https://github.com/elastic/elasticsearch/issues/100246, so this must be something else.

**Build scan:**
https://gradle-enterprise.elastic.co/s/tnywnp3hpi5r2/tests/:server:test/org.elasticsearch.index.mapper.IdLoaderTests/testSynthesizeIdMultipleSegments
**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.index.mapper.IdLoaderTests.testSynthesizeIdMultipleSegments" -Dtests.seed=7C2B0FEF26582A2D -Dtests.locale=hi -Dtests.timezone=America/Bahia_Banderas -Druntime.java=21
```

**Applicable branches:**
main

**Reproduces locally?:**
Didn't try

**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 <6>

  at __randomizedtesting.SeedInfo.seed([7C2B0FEF26582A2D:D24A865EE4A28F57]: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:216)
  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
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");
        Set<String> expectedIDs = new HashSet<>();
        List<Doc> randomDocs = new ArrayList<>();
        int numberOfTimeSeries = randomIntBetween(8, 64);
        for (int i = 0; i < numberOfTimeSeries; i++) {
            int numberOfDimensions = randomIntBetween(1, 6);
            List<Dimension> dimensions = new ArrayList<>(numberOfDimensions);
            for (int j = 1; j <= numberOfDimensions; j++) {
                String fieldName = "dim" + j;
                Object value;
                if (j == 5) {
                    value = randomLongBetween(1, 20);
                } else {
                    value = randomAlphaOfLength(4);
                }
                dimensions.add(new Dimension(fieldName, value));
            }
            int numberOfSamples = randomIntBetween(1, 16);
            for (int j = 0; j < numberOfSamples; j++) {
                Doc doc = new Doc(startTime++, dimensions);
                randomDocs.add(doc);
                expectedIDs.add(expectedId(routing, doc));
            }
        }
        CheckedConsumer<IndexReader, IOException> verify = indexReader -> {
            assertThat(indexReader.leaves(), hasSize(1));
            LeafReader leafReader = indexReader.leaves().get(0).reader();