diff --git a/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart b/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart
index 668e1de0..93e62471 100644
--- a/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart
+++ b/frontend/mobile-app/lib/features/auth/presentation/pages/splash_page.dart
@@ -8,6 +8,7 @@ import '../../../../bootstrap.dart';
 import '../../../../core/providers/maintenance_provider.dart';
 import '../../../../core/di/injection_container.dart';
 import '../../../../core/services/pending_action_polling_service.dart'; // ignore: unused_import
+import '../../../../core/storage/storage_keys.dart';
 import '../../../../routes/app_router.dart';
 import '../providers/auth_provider.dart';
 
@@ -229,7 +230,10 @@ class _SplashPageState extends ConsumerState<SplashPage> {
     _isNavigating = true;
 
     // 初始化遥测服务（需要 BuildContext）
-    await initializeTelemetry(context);
+    // 先读已登录用户，避免 session_start 丢失 userId
+    final secureStorage = ref.read(secureStorageProvider);
+    final storedUserId = await secureStorage.read(key: StorageKeys.userSerialNum);
+    await initializeTelemetry(context, userId: storedUserId);
 
     if (!mounted) return;