diff --git a/astrbot/core/core_lifecycle.py b/astrbot/core/core_lifecycle.py
index cb9fb9191..9a4ba1320 100644
--- a/astrbot/core/core_lifecycle.py
+++ b/astrbot/core/core_lifecycle.py
@@ -279,6 +279,9 @@ class AstrBotCoreLifecycle:
         # Leave other runtime initializations (plugin reload, provider init, etc.)
         # to `bootstrap_runtime`.
 
+        # Initialize dashboard shutdown event (matches full initialize behavior)
+        self.dashboard_shutdown_event = asyncio.Event()
+
     async def bootstrap_runtime(self) -> None:
         """Compatibility method for runtime bootstrap (deferred initialization).
 
@@ -340,6 +343,9 @@ class AstrBotCoreLifecycle:
                     "Failed cleaning up plugins after runtime bootstrap failure",
                 )
 
+            # Reset event_bus to None so callers can detect partial init
+            self.event_bus = None
+
             try:
                 if getattr(self, "provider_manager", None) and hasattr(
                     self.provider_manager,
diff --git a/tests/unit/test_core_lifecycle.py b/tests/unit/test_core_lifecycle.py
index e253ccd7c..a719c51c2 100644
--- a/tests/unit/test_core_lifecycle.py
+++ b/tests/unit/test_core_lifecycle.py
@@ -722,10 +722,10 @@ class TestAstrBotCoreLifecycleInitialize:
         )
         mocks["create_task"].side_effect = record_create_task
 
+        lifecycle.load_pipeline_scheduler = load_pipeline_scheduler
+
         with patch_initialize_test_mocks(mock_astrbot_config, mocks):
             await lifecycle.initialize_core()
-
-
             await lifecycle.bootstrap_runtime()
 
         assert call_order == [