diff --git a/x-pack/plugins/triggers_actions_ui/public/application/sections/alert_details/components/alert_instances.tsx b/x-pack/plugins/triggers_actions_ui/public/application/sections/alert_details/components/alert_instances.tsx
index 403a4c639fb35..6f49b443ed80d 100644
--- a/x-pack/plugins/triggers_actions_ui/public/application/sections/alert_details/components/alert_instances.tsx
+++ b/x-pack/plugins/triggers_actions_ui/public/application/sections/alert_details/components/alert_instances.tsx
@@ -38,6 +38,7 @@ export const alertInstancesTableColumns = (
       { defaultMessage: 'Instance' }
     ),
     sortable: false,
+    truncateText: true,
     'data-test-subj': 'alertInstancesTableCell-instance',
   },
   {
diff --git a/x-pack/plugins/uptime/server/lib/alerts/__tests__/status_check.test.ts b/x-pack/plugins/uptime/server/lib/alerts/__tests__/status_check.test.ts
index 06b298aedeb2b..6757ab483dbad 100644
--- a/x-pack/plugins/uptime/server/lib/alerts/__tests__/status_check.test.ts
+++ b/x-pack/plugins/uptime/server/lib/alerts/__tests__/status_check.test.ts
@@ -1201,10 +1201,10 @@ describe('status check alert', () => {
     it('creates a set of unique IDs from a list of composite unique objects', () => {
       expect(getUniqueIdsByLoc(downItems, availItems)).toEqual(
         new Set<string>([
-          'firstharrisburg',
-          'firstfairbanks',
-          'secondharrisburg',
-          'secondfairbanks',
+          'first-harrisburg',
+          'first-fairbanks',
+          'second-harrisburg',
+          'second-fairbanks',
         ])
       );
     });
diff --git a/x-pack/plugins/uptime/server/lib/alerts/status_check.ts b/x-pack/plugins/uptime/server/lib/alerts/status_check.ts
index 82d8d6e07322b..74a1af5ff1231 100644
--- a/x-pack/plugins/uptime/server/lib/alerts/status_check.ts
+++ b/x-pack/plugins/uptime/server/lib/alerts/status_check.ts
@@ -32,15 +32,19 @@ import { UMServerLibs } from '../lib';
 
 const { MONITOR_STATUS } = ACTION_GROUP_DEFINITIONS;
 
+const getMonIdByLoc = (monitorId: string, location: string) => {
+  return monitorId + '-' + location;
+};
+
 const uniqueDownMonitorIds = (items: GetMonitorStatusResult[]): Set<string> =>
   items.reduce(
-    (acc, { monitorId, location }) => acc.add(monitorId + '-' + location),
+    (acc, { monitorId, location }) => acc.add(getMonIdByLoc(monitorId, location)),
     new Set<string>()
   );
 
 const uniqueAvailMonitorIds = (items: GetMonitorAvailabilityResult[]): Set<string> =>
   items.reduce(
-    (acc, { monitorId, location }) => acc.add(monitorId + '-' + location),
+    (acc, { monitorId, location }) => acc.add(getMonIdByLoc(monitorId, location)),
     new Set<string>()
   );
 
@@ -330,11 +334,11 @@ export const statusCheckAlertFactory: UptimeAlertTypeFactory = (_server, libs) =
 
       mergedIdsByLoc.forEach((monIdByLoc) => {
         const availMonInfo = availabilityResults.find(
-          ({ monitorId, location }) => monitorId + location === monIdByLoc
+          ({ monitorId, location }) => getMonIdByLoc(monitorId, location) === monIdByLoc
         );
 
         const downMonInfo = downMonitorsByLocation.find(
-          ({ monitorId, location }) => monitorId + location === monIdByLoc
+          ({ monitorId, location }) => getMonIdByLoc(monitorId, location) === monIdByLoc
         )?.monitorInfo;
 
         const monitorInfo = downMonInfo || availMonInfo?.monitorInfo!;