From 6a3b09ff3bab6a2219737493def7e68ba52119b9 Mon Sep 17 00:00:00 2001
From: Bena Kansara <69037875+benakansara@users.noreply.github.com>
Date: Tue, 5 Nov 2024 13:57:32 +0100
Subject: [PATCH] [Observability] [Alerts table] Fix cannot display alerts
 error (#198914)

Resolves https://github.com/elastic/kibana/issues/198912

### Testing
- Create ES query rule in Observability
- Open Alert flyout of the ES query alert
- Verify that Alert flyout opens as expected

(cherry picked from commit f8c01d41d2dc6c4c4d096c485b48dc7decafd873)
---
 .../alert_overview/helpers/map_rules_params_with_flyout.ts      | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/x-pack/plugins/observability_solution/observability/public/components/alert_overview/helpers/map_rules_params_with_flyout.ts b/x-pack/plugins/observability_solution/observability/public/components/alert_overview/helpers/map_rules_params_with_flyout.ts
index fce4bd35dbdee..2ecda6419a06f 100644
--- a/x-pack/plugins/observability_solution/observability/public/components/alert_overview/helpers/map_rules_params_with_flyout.ts
+++ b/x-pack/plugins/observability_solution/observability/public/components/alert_overview/helpers/map_rules_params_with_flyout.ts
@@ -269,7 +269,7 @@ export const mapRuleParamsWithFlyout = (alert: TopAlert): FlyoutThresholdData[]
       const { thresholdComparator, threshold } = ruleParams as EsQueryRuleParams;
       const ESQueryFlyoutMap = {
         observedValue: [alert.fields[ALERT_EVALUATION_VALUE]],
-        threshold: threshold.join(' AND '),
+        threshold: [threshold].flat().join(' AND '),
         comparator: thresholdComparator,
         pctAboveThreshold: getPctAboveThreshold(
           threshold,