This looks to be a newly added test in #89430 and failed for me in a PR.

**Build scan:**
https://gradle-enterprise.elastic.co/s/ctyyqap6ywxok/tests/:server:test/org.elasticsearch.index.shard.IndexShardTests/testFlushOnIdleConcurrentFlushDoesNotWait

**Reproduction line:**
`./gradlew ':server:test' --tests "org.elasticsearch.index.shard.IndexShardTests.testFlushOnIdleConcurrentFlushDoesNotWait" -Dtests.seed=3B825C4D0772201A -Dtests.locale=ru-RU -Dtests.timezone=Australia/Broken_Hill -Druntime.java=17`

**Applicable branches:**
main

**Reproduces locally?:**
No

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.index.shard.IndexShardTests&tests.test=testFlushOnIdleConcurrentFlushDoesNotWait

**Failure excerpt:**
```
java.lang.AssertionError: expected to see should see first flush getting lock immediately but did not
Expected: <true>
     but: was <false>

  at __randomizedtesting.SeedInfo.seed([3B825C4D0772201A:B93D2E3091554306]:0)
  at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
  at org.elasticsearch.test.MockLogAppender$SeenEventExpectation.assertMatched(MockLogAppender.java:121)
  at org.elasticsearch.test.MockLogAppender.assertAllExpectationsMatched(MockLogAppender.java:55)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1104)
  at org.elasticsearch.test.ESTestCase.assertBusy(ESTestCase.java:1077)
  at org.elasticsearch.index.shard.IndexShardTests.testFlushOnIdleConcurrentFlushDoesNotWait(IndexShardTests.java:3939)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
  at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
  at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:568)
  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:44)
  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:833)

```
server/src/test/java/org/elasticsearch/index/shard/IndexShardTests.java
mappingVersion,
                    ActionListener.wrap(r -> {
                        assertListenerCalled.accept(replica);
                        listener.onResponse(r);
                    }, listener::onFailure)
                );
            }
            @Override
            public void finalizeRecovery(long globalCheckpoint, long trimAboveSeqNo, ActionListener<Void> listener) {
                super.finalizeRecovery(globalCheckpoint, trimAboveSeqNo, ActionListener.wrap(r -> {
                    assertListenerCalled.accept(replica);
                    listener.onResponse(r);
                }, listener::onFailure));
            }
        }, false, true);
        closeShards(primary, replica);
    }
    public void testRecoverFromLocalShard() throws IOException {
        Settings settings = Settings.builder()
            .put(IndexMetadata.SETTING_VERSION_CREATED, Version.CURRENT)
            .put(IndexMetadata.SETTING_NUMBER_OF_REPLICAS, 1)
            .put(IndexMetadata.SETTING_NUMBER_OF_SHARDS, 1)
            .build();
        IndexMetadata metadata = IndexMetadata.builder("source")
            .putMapping("{ \"properties\": { \"foo\":  { \"type\": \"text\"}}}")
            .settings(settings)
            .primaryTerm(0, 1)
            .build();
        IndexShard sourceShard = newShard(new ShardId(metadata.getIndex(), 0), true, "n1", metadata, null);
        recoverShardFromStore(sourceShard);