Is this potentially related to this recent change in that area done in  https://github.com/elastic/elasticsearch/pull/86054 ?

**Build scan:**
https://gradle-enterprise.elastic.co/s/azmukpqpbn4yq/tests/:x-pack:plugin:security:test/org.elasticsearch.xpack.security.authc.ApiKeyServiceTests/testGetApiKeyMetadata

**Reproduction line:**
`./gradlew ':x-pack:plugin:security:test' --tests "org.elasticsearch.xpack.security.authc.ApiKeyServiceTests.testGetApiKeyMetadata" -Dtests.seed=F333870E25DA21A1 -Dtests.locale=zh-Hans-CN -Dtests.timezone=America/Porto_Velho -Druntime.java=17`

**Applicable branches:**
master

**Reproduces locally?:**
Yes

**Failure history:**
https://gradle-enterprise.elastic.co/scans/tests?tests.container=org.elasticsearch.xpack.security.authc.ApiKeyServiceTests&tests.test=testGetApiKeyMetadata

**Failure excerpt:**
```
java.lang.AssertionError: 
Expected: a map with size <0>
     but: map size was <4>

  at __randomizedtesting.SeedInfo.seed([F333870E25DA21A1:141EE9790AB7BA34]: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.xpack.security.authc.ApiKeyServiceTests.testGetApiKeyMetadata(ApiKeyServiceTests.java:1694)
  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:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.forkTimeoutingTask(ThreadLeakControl.java:824)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl$3.evaluate(ThreadLeakControl.java:475)
  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:375)
  at com.carrotsearch.randomizedtesting.ThreadLeakControl.lambda$forkTimeoutingTask$0(ThreadLeakControl.java:831)
  at java.lang.Thread.run(Thread.java:833)

```
x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authc/ApiKeyServiceTests.java
);
        PlainActionFuture<AuthenticationResult<User>> future3 = new PlainActionFuture<>();
        service.loadApiKeyAndValidateCredentials(threadContext, apiKeyCredentials3, future3);
        final ApiKeyService.CachedApiKeyDoc cachedApiKeyDoc3 = service.getDocCache().get(docId3);
        assertNotNull(cachedApiKeyDoc3);
        assertEquals("banner", cachedApiKeyDoc3.creator.get("principal"));
        
        assertSame(
            limitedByRoleDescriptorsBytes,
            service.getRoleDescriptorsBytesCache().get(cachedApiKeyDoc3.limitedByRoleDescriptorsHash)
        );
        
        final BytesReference roleDescriptorsBytes3 = service.getRoleDescriptorsBytesCache().get(cachedApiKeyDoc3.roleDescriptorsHash);
        assertNotSame(roleDescriptorsBytes, roleDescriptorsBytes3);
        assertEquals(3, service.getRoleDescriptorsBytesCache().count());
        if (metadata3 == null) {
            assertNull(cachedApiKeyDoc3.metadataFlattened);
        } else {
            assertThat(cachedApiKeyDoc3.metadataFlattened, equalTo(XContentTestUtils.convertToXContent(metadata3, XContentType.JSON)));
        }
        
        
        service.getRoleDescriptorsBytesCache().invalidateAll();
        final Map<String, Object> metadata4 = mockKeyDocument(
            service,
            docId,
            apiKey,
            new User("hulk", "superuser"),
            false,
            Duration.ofSeconds(3600)