This happened in a PR but I don't think its related to the change there. Also I couldn't reproduce locally with the given seed, but I found a few similar looking errors in recent CI history that I will add here, hoping the build scans of those are still there.

**Build scan:**
https://gradle-enterprise.elastic.co/s/3fehoe67iezom/tests/:server:test/org.elasticsearch.search.aggregations.bucket.histogram.VariableWidthHistogramAggregatorTests/testMultipleSegments

**Reproduction line:**
```
./gradlew ':server:test' --tests "org.elasticsearch.search.aggregations.bucket.histogram.VariableWidthHistogramAggregatorTests.testMultipleSegments" -Dtests.seed=38D40B77C192C67A -Dtests.locale=ms-MY -Dtests.timezone=Pacific/Bougainville -Druntime.java=20
```

**Applicable branches:**
main

**Reproduces locally?:**
No

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.search.aggregations.bucket.histogram.VariableWidthHistogramAggregatorTests&tests.test=testMultipleSegments

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: (a value equal to or greater than <4L> and a value less than or equal to <7L>)
     but: a value equal to or greater than <4L> <3L> was less than <4L>

  at __randomizedtesting.SeedInfo.seed([38D40B77C192C67A:84A3BE2E06356A3F]: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.search.aggregations.bucket.histogram.VariableWidthHistogramAggregatorTests.lambda$testMultipleSegments$31(VariableWidthHistogramAggregatorTests.java:454)
  at org.elasticsearch.search.aggregations.bucket.histogram.VariableWidthHistogramAggregatorTests.testSearchCase(VariableWidthHistogramAggregatorTests.java:634)
  at org.elasticsearch.search.aggregations.bucket.histogram.VariableWidthHistogramAggregatorTests.testMultipleSegments(VariableWidthHistogramAggregatorTests.java:438)
  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/main/java/org/elasticsearch/search/aggregations/bucket/histogram/VariableWidthHistogramAggregationBuilder.java
}
    public int getNumBuckets() {
        return numBuckets;
    }
    public int getShardSize() {
        if (shardSize == -1) {
            return numBuckets * 50;
        }
        return shardSize;
    }
    public int getInitialBuffer() {
        if (initialBuffer == -1) {
            return Math.min(10 * getShardSize(), 50000);
        }
        return initialBuffer;
    }
    @Override
    public BucketCardinality bucketCardinality() {
        return BucketCardinality.MANY;
    }
    @Override
    protected AggregationBuilder shallowCopy(AggregatorFactories.Builder factoriesBuilder, Map<String, Object> metaData) {
        return new VariableWidthHistogramAggregationBuilder(this, factoriesBuilder, metaData);
    }
    @Override
    protected void innerWriteTo(StreamOutput out) throws IOException {
        out.writeVInt(numBuckets);
    }
    @Override
    protected ValuesSourceAggregatorFactory innerBuild(