From 996a742f76c8656f91a4a5ae1ba7fe4885b7330f Mon Sep 17 00:00:00 2001
From: Laurent Nguyen <languye@microsoft.com>
Date: Mon, 19 Jan 2026 14:41:35 +0100
Subject: [PATCH] fix: prevent race condition by initializing scenario tracking
 after config is set

---
 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) {