diff --git a/x-pack/plugins/alerting/server/alerts_service/alerts_service.test.ts b/x-pack/plugins/alerting/server/alerts_service/alerts_service.test.ts
index 0823e327e0adbc..def19570f7e0a5 100644
--- a/x-pack/plugins/alerting/server/alerts_service/alerts_service.test.ts
+++ b/x-pack/plugins/alerting/server/alerts_service/alerts_service.test.ts
@@ -1614,6 +1614,7 @@ describe('Alerts Service', () => {
               revision: 0,
               spaceId: 'default',
               tags: ['rule-', '-tags'],
+              alertDelay: 0,
             },
             kibanaVersion: '8.8.0',
           });
@@ -1731,6 +1732,7 @@ describe('Alerts Service', () => {
               revision: 0,
               spaceId: 'default',
               tags: ['rule-', '-tags'],
+              alertDelay: 0,
             },
             kibanaVersion: '8.8.0',
           });
@@ -1901,6 +1903,7 @@ describe('Alerts Service', () => {
               revision: 0,
               spaceId: 'default',
               tags: ['rule-', '-tags'],
+              alertDelay: 0,
             },
             kibanaVersion: '8.8.0',
           });
diff --git a/x-pack/plugins/alerting/server/lib/alerting_event_logger/alerting_event_logger.ts b/x-pack/plugins/alerting/server/lib/alerting_event_logger/alerting_event_logger.ts
index 680279f5dbac7f..2c177dac75cd29 100644
--- a/x-pack/plugins/alerting/server/lib/alerting_event_logger/alerting_event_logger.ts
+++ b/x-pack/plugins/alerting/server/lib/alerting_event_logger/alerting_event_logger.ts
@@ -53,6 +53,7 @@ interface AlertOpts {
   state?: AlertInstanceState;
   flapping: boolean;
   maintenanceWindowIds?: string[];
+  alertCreationDelay?: boolean;
 }
 
 interface ActionOpts {
@@ -269,6 +270,7 @@ export function createAlertRecord(context: RuleContextOpts, alert: AlertOpts) {
     flapping: alert.flapping,
     maintenanceWindowIds: alert.maintenanceWindowIds,
     ruleRevision: context.ruleRevision,
+    alertCreationDelay: alert.alertCreationDelay,
   });
 }
 
diff --git a/x-pack/plugins/alerting/server/lib/create_alert_event_log_record_object.ts b/x-pack/plugins/alerting/server/lib/create_alert_event_log_record_object.ts
index 251df68e5267f7..86add440656ba4 100644
--- a/x-pack/plugins/alerting/server/lib/create_alert_event_log_record_object.ts
+++ b/x-pack/plugins/alerting/server/lib/create_alert_event_log_record_object.ts
@@ -44,6 +44,7 @@ interface CreateAlertEventLogRecordParams {
   };
   maintenanceWindowIds?: string[];
   ruleRevision?: number;
+  alertCreationDelay?: boolean;
 }
 
 export function createAlertEventLogRecordObject(params: CreateAlertEventLogRecordParams): Event {
@@ -64,6 +65,7 @@ export function createAlertEventLogRecordObject(params: CreateAlertEventLogRecor
     alertSummary,
     maintenanceWindowIds,
     ruleRevision,
+    alertCreationDelay,
   } = params;
   const alerting =
     params.instanceId || group || alertSummary
@@ -98,6 +100,7 @@ export function createAlertEventLogRecordObject(params: CreateAlertEventLogRecor
         ...(flapping !== undefined ? { flapping } : {}),
         ...(maintenanceWindowIds ? { maintenance_window_ids: maintenanceWindowIds } : {}),
         ...(alertUuid ? { uuid: alertUuid } : {}),
+        ...(alertCreationDelay !== undefined ? { alert_creation_delay: alertCreationDelay } : {}),
         rule: {
           revision: ruleRevision,
           rule_type_id: ruleType.id,
diff --git a/x-pack/plugins/alerting/server/routes/update_rule.test.ts b/x-pack/plugins/alerting/server/routes/update_rule.test.ts
index c942546ba8faef..b48e6d72bef3f6 100644
--- a/x-pack/plugins/alerting/server/routes/update_rule.test.ts
+++ b/x-pack/plugins/alerting/server/routes/update_rule.test.ts
@@ -142,10 +142,10 @@ describe('updateRuleRoute', () => {
                 "uuid": "1234-5678",
               },
             ],
-            "name": "abc",
             "alertDelay": Object {
               "active": 10,
             },
+            "name": "abc",
             "notifyWhen": "onActionGroupChange",
             "params": Object {
               "otherField": false,
diff --git a/x-pack/plugins/alerting/server/rules_client/tests/update.test.ts b/x-pack/plugins/alerting/server/rules_client/tests/update.test.ts
index ceab7ad16f01c1..7384ab467a8e97 100644
--- a/x-pack/plugins/alerting/server/rules_client/tests/update.test.ts
+++ b/x-pack/plugins/alerting/server/rules_client/tests/update.test.ts
@@ -370,12 +370,12 @@ describe('update()', () => {
             },
           },
         ],
-        "createdAt": 2019-02-12T21:01:22.479Z,
-        "enabled": true,
-        "id": "1",
         "alertDelay": Object {
           "active": 5,
         },
+        "createdAt": 2019-02-12T21:01:22.479Z,
+        "enabled": true,
+        "id": "1",
         "notifyWhen": "onActiveAlert",
         "params": Object {
           "bar": true,
@@ -431,6 +431,9 @@ describe('update()', () => {
             "uuid": "102",
           },
         ],
+        "alertDelay": Object {
+          "active": 10,
+        },
         "alertTypeId": "myType",
         "apiKey": null,
         "apiKeyCreatedByUser": null,
@@ -445,9 +448,6 @@ describe('update()', () => {
           "versionApiKeyLastmodified": "v7.10.0",
         },
         "name": "abc",
-        "alertDelay": Object {
-          "active": 10,
-        },
         "notifyWhen": "onActiveAlert",
         "params": Object {
           "bar": true,
diff --git a/x-pack/plugins/alerting/server/task_runner/task_runner_alerts_client.test.ts b/x-pack/plugins/alerting/server/task_runner/task_runner_alerts_client.test.ts
index ebf81f5bf050ec..bd47acbbdb8c13 100644
--- a/x-pack/plugins/alerting/server/task_runner/task_runner_alerts_client.test.ts
+++ b/x-pack/plugins/alerting/server/task_runner/task_runner_alerts_client.test.ts
@@ -302,6 +302,7 @@ describe('Task Runner', () => {
           ruleType: ruleTypeWithAlerts,
           namespace: 'default',
           rule: {
+            alertDelay: 0,
             consumer: 'bar',
             executionId: '5f6aa57d-3e22-484e-bae8-cbed868f4d28',
             id: '1',
@@ -800,6 +801,7 @@ describe('Task Runner', () => {
 
       expect(alertsClientToUse.processAlerts).toHaveBeenCalledWith({
         notifyOnActionGroupChange: false,
+        alertDelay: 0,
         flappingSettings: {
           enabled: true,
           lookBackWindow: 20,
diff --git a/x-pack/plugins/rule_registry/server/utils/get_updated_flapping_history.test.ts b/x-pack/plugins/rule_registry/server/utils/get_updated_flapping_history.test.ts
index 52467f168e641c..84685779186d97 100644
--- a/x-pack/plugins/rule_registry/server/utils/get_updated_flapping_history.test.ts
+++ b/x-pack/plugins/rule_registry/server/utils/get_updated_flapping_history.test.ts
@@ -49,6 +49,7 @@ describe('getUpdatedFlappingHistory', () => {
           flappingHistory: [],
           flapping: false,
           pendingRecoveredCount: 0,
+          activeCount: 0,
         },
       },
       trackedAlertsRecovered: {},
@@ -81,6 +82,7 @@ describe('getUpdatedFlappingHistory', () => {
           flappingHistory: [],
           flapping: false,
           pendingRecoveredCount: 0,
+          activeCount: 0,
         },
       },
       trackedAlerts: {},
@@ -115,6 +117,7 @@ describe('getUpdatedFlappingHistory', () => {
           flappingHistory: [],
           flapping: false,
           pendingRecoveredCount: 0,
+          activeCount: 0,
         },
       },
       trackedAlertsRecovered: {},
@@ -150,6 +153,7 @@ describe('getUpdatedFlappingHistory', () => {
           flappingHistory: [],
           flapping: false,
           pendingRecoveredCount: 0,
+          activeCount: 0,
         },
       },
     };
@@ -184,6 +188,7 @@ describe('getUpdatedFlappingHistory', () => {
           flappingHistory: [],
           flapping: false,
           pendingRecoveredCount: 0,
+          activeCount: 0,
         },
       },
     };
diff --git a/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group4/alerts_as_data/alerts_as_data_alert_delay.ts b/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group4/alerts_as_data/alerts_as_data_alert_delay.ts
index a5039d439b72e0..f7e2876e9775b2 100644
--- a/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group4/alerts_as_data/alerts_as_data_alert_delay.ts
+++ b/x-pack/test/alerting_api_integration/spaces_only/tests/alerting/group4/alerts_as_data/alerts_as_data_alert_delay.ts
@@ -72,6 +72,11 @@ export default function createAlertsAsDataAlertDelayInstallResourcesTest({
     before(async () => {
       await esTestIndexTool.destroy();
       await esTestIndexTool.setup();
+      await es.deleteByQuery({
+        index: [alertsAsDataIndex, alwaysFiringAlertsAsDataIndex],
+        query: { match_all: {} },
+        conflicts: 'proceed',
+      });
     });
     afterEach(() => objectRemover.removeAll());
     after(async () => {