diff --git a/packages/react-native/ReactCommon/cxxreact/ReactMarker.cpp b/packages/react-native/ReactCommon/cxxreact/ReactMarker.cpp
index e9059dac7137c8..86c3a03c9df5bf 100644
--- a/packages/react-native/ReactCommon/cxxreact/ReactMarker.cpp
+++ b/packages/react-native/ReactCommon/cxxreact/ReactMarker.cpp
@@ -53,9 +53,13 @@ void StartupLogger::logStartupEvent(
     double markerTime) {
   switch (markerId) {
     case ReactMarkerId::APP_STARTUP_START:
-      if (std::isnan(appStartupStartTime)) {
-        appStartupStartTime = markerTime;
+      if (!std::isnan(appStartupStartTime)) {
+        // We had a startup start time, which indicates a warm start (user
+        // closed the app and start again). In this case we need to invalidate
+        // all other startup timings.
+        reset();
       }
+      appStartupStartTime = markerTime;
       return;
 
     case ReactMarkerId::APP_STARTUP_STOP:
@@ -93,6 +97,15 @@ void StartupLogger::logStartupEvent(
   }
 }
 
+void StartupLogger::reset() {
+  appStartupStartTime = std::nan("");
+  appStartupEndTime = std::nan("");
+  initReactRuntimeStartTime = std::nan("");
+  initReactRuntimeEndTime = std::nan("");
+  runJSBundleStartTime = std::nan("");
+  runJSBundleEndTime = std::nan("");
+}
+
 double StartupLogger::getAppStartupStartTime() {
   return appStartupStartTime;
 }
diff --git a/packages/react-native/ReactCommon/cxxreact/ReactMarker.h b/packages/react-native/ReactCommon/cxxreact/ReactMarker.h
index 8d3a532e2c4e0d..e50746780d4867 100644
--- a/packages/react-native/ReactCommon/cxxreact/ReactMarker.h
+++ b/packages/react-native/ReactCommon/cxxreact/ReactMarker.h
@@ -74,6 +74,7 @@ class RN_EXPORT StartupLogger {
   static StartupLogger& getInstance();
 
   void logStartupEvent(const ReactMarkerId markerName, double markerTime);
+  void reset();
   double getAppStartupStartTime();
   double getInitReactRuntimeStartTime();
   double getInitReactRuntimeEndTime();