diff --git a/app/runtime/event/registry.py b/app/runtime/event/registry.py
index 554145dbd..003f9f01c 100644
--- a/app/runtime/event/registry.py
+++ b/app/runtime/event/registry.py
@@ -29,11 +29,19 @@ class EventRegistry:
         self._disabled_handlers = disabled_handlers
         self._disabled_classes = disabled_classes
 
+    @staticmethod
+    def _module_name(target: Callable | type) -> str:
+        """优先读取对象保留的模块名，避免卸载缓存后事件标识漂移。"""
+        module_name = getattr(target, "__module__", None)
+        if module_name:
+            return module_name
+        module = inspect.getmodule(target)
+        return module.__name__ if module else "unknown_module"
+
     @staticmethod
     def handler_identifier(target: Callable | type) -> str:
         """返回包含模块和限定名的稳定处理器标识。"""
-        module = inspect.getmodule(target)
-        module_name = module.__name__ if module else "unknown_module"
+        module_name = EventRegistry._module_name(target)
         return f"{module_name}.{target.__qualname__}"
 
     @classmethod
@@ -46,8 +54,7 @@ class EventRegistry:
         qualname_parts = handler.__qualname__.split(".")
         if len(qualname_parts) <= 1:
             return None
-        module = inspect.getmodule(handler)
-        module_name = module.__name__ if module else "unknown_module"
+        module_name = cls._module_name(handler)
         return f"{module_name}.{'.'.join(qualname_parts[:-1])}"
 
     def is_handler_enabled(self, handler: Callable) -> bool:
diff --git a/tests/test_event_runtime_components.py b/tests/test_event_runtime_components.py
index 5605749ac..0ef669a38 100644
--- a/tests/test_event_runtime_components.py
+++ b/tests/test_event_runtime_components.py
@@ -10,7 +10,9 @@ from app.runtime.event.binding import (
     EventBindingResolver,
     EventHandlerBinding,
 )
+from app.runtime.event.dispatch import EventDispatcher
 from app.runtime.event.errors import EventErrorPolicy
+from app.runtime.event.registry import EventRegistry
 from app.runtime.events import Event
 from app.runtime.extensions.plugin import manager as plugin_manager_module
 from app.runtime.extensions.plugin.manager import PluginManager
@@ -85,14 +87,69 @@ def test_unloaded_module_class_handler_is_skipped() -> None:
             resolvers=lambda: {},
         )
         assert binding.resolve(residual_handler) is None
-        # 模块卸载后 identifier 回退为 unknown_module 前缀，与线上日志一致
         assert binding.unresolved_handlers() == (
-            "unknown_module._ResidualPlugin.reload",
+            f"{fake_name}._ResidualPlugin.reload",
         )
     finally:
         sys.modules.pop(fake_name, None)
 
 
+def test_quiesced_handler_stays_disabled_after_module_unload() -> None:
+    """事件快照中的旧 handler 在模块卸载后仍应按已禁用状态跳过。"""
+    fake_name = "tests._fake_quiesced_plugin"
+    fake_module = types.ModuleType(fake_name)
+    sys.modules[fake_name] = fake_module
+    try:
+        exec(
+            "class _QuiescedPlugin:\n"
+            "    def reload(self, event):\n"
+            "        raise AssertionError('quiesced handler must not run')\n",
+            fake_module.__dict__,
+        )
+        residual_handler = fake_module._QuiescedPlugin.reload
+        broadcast_subscribers: dict = {}
+        disabled_handlers: set[str] = set()
+        disabled_classes: set[str] = set()
+        registry = EventRegistry(
+            lock=threading.Lock(),
+            broadcast_subscribers=lambda: broadcast_subscribers,
+            chain_subscribers=lambda: {},
+            disabled_handlers=lambda: disabled_handlers,
+            disabled_classes=lambda: disabled_classes,
+        )
+        registry.add(EventType.PluginReload, residual_handler, 0)
+        registry.disable(fake_module._QuiescedPlugin)
+        del sys.modules[fake_name]
+
+        assert EventRegistry.handler_identifier(residual_handler) == (
+            f"{fake_name}._QuiescedPlugin.reload"
+        )
+        assert EventRegistry.handler_class_identifier(residual_handler) == (
+            f"{fake_name}._QuiescedPlugin"
+        )
+        assert not registry.is_handler_enabled(residual_handler)
+
+        binding = EventBindingResolver(
+            lock=threading.Lock(),
+            resolvers=lambda: {},
+        )
+        dispatcher = EventDispatcher(
+            registry=registry,
+            binding_resolver=binding,
+            event_factory=Event,
+            error_handler=lambda **_kwargs: None,
+            async_handle_sink=lambda _handle: True,
+            sync_handle_sink=lambda _callback, _args: True,
+        )
+        dispatcher.dispatch_broadcast_strict(
+            Event(EventType.PluginReload, {"plugin_id": "_QuiescedPlugin"}),
+            lambda _awaitable: None,
+        )
+        assert binding.unresolved_handlers() == ()
+    finally:
+        sys.modules.pop(fake_name, None)
+
+
 def test_unloaded_module_decorator_wrapped_method_is_skipped() -> None:
     """装饰器包装的类方法限定名含 <locals>，模块卸载后也必须跳过而非直调。"""
     fake_name = "tests._fake_unloaded_decorated_plugin"
@@ -121,7 +178,7 @@ def test_unloaded_module_decorator_wrapped_method_is_skipped() -> None:
         )
         assert binding.resolve(residual_handler) is None
         assert binding.unresolved_handlers() == (
-            "unknown_module._deco.<locals>.wrapper",
+            f"{fake_name}._deco.<locals>.wrapper",
         )
     finally:
         sys.modules.pop(fake_name, None)