From 6dce2632c82f6053054854752089e95e03391eb3 Mon Sep 17 00:00:00 2001
From: Laurent Nguyen <laurent.nguyen@microsoft.com>
Date: Wed, 21 Jan 2026 17:28:08 +0100
Subject: [PATCH] fix: prevent race condition by initializing scenario tracking
 after config is set (#2339)

Co-authored-by: Laurent Nguyen <languye@microsoft.com>
---
 src/Main.tsx | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/Main.tsx b/src/Main.tsx
index af3d462a7..c90f016ac 100644
--- a/src/Main.tsx
+++ b/src/Main.tsx
@@ -105,9 +105,12 @@ const App = (): JSX.Element => {
   // Scenario-based health tracking: start ApplicationLoad and complete phases.
   const { startScenario, completePhase } = useMetricScenario();
   React.useEffect(() => {
-    startScenario(MetricScenario.ApplicationLoad);
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
+    // Only start scenario after config is initialized to avoid race conditions
+    // with message handlers that depend on configContext.platform
+    if (config) {
+      startScenario(MetricScenario.ApplicationLoad);
+    }
+  }, [config, startScenario]);
 
   React.useEffect(() => {
     if (explorer) {