diff --git a/scrapling/engines/static.py b/scrapling/engines/static.py
index 1f4b09b..b74c730 100644
--- a/scrapling/engines/static.py
+++ b/scrapling/engines/static.py
@@ -716,8 +716,13 @@ class FetcherSession:
             config["selector_config"] = self.selector_config
             config["proxy_rotator"] = self._proxy_rotator
             self._client = _SyncSessionLogic(**config)
+            try:
+                result = self._client.__enter__()
+            except Exception:
+                self._client = None
+                raise
             self._is_alive = True
-            return self._client.__enter__()
+            return result
         raise RuntimeError("This FetcherSession instance already has an active synchronous session.")
 
     def __exit__(self, exc_type, exc_val, exc_tb):
@@ -737,8 +742,13 @@ class FetcherSession:
             config["selector_config"] = self.selector_config
             config["proxy_rotator"] = self._proxy_rotator
             self._client = _ASyncSessionLogic(**config)
+            try:
+                result = await self._client.__aenter__()
+            except Exception:
+                self._client = None
+                raise
             self._is_alive = True
-            return await self._client.__aenter__()
+            return result
         raise RuntimeError("This FetcherSession instance already has an active asynchronous session.")
 
     async def __aexit__(self, exc_type, exc_val, exc_tb):
diff --git a/scrapling/spiders/session.py b/scrapling/spiders/session.py
index 536be6d..5799e8c 100644
--- a/scrapling/spiders/session.py
+++ b/scrapling/spiders/session.py
@@ -93,7 +93,9 @@ class SessionManager:
 
     async def close(self) -> None:
         """Close all registered sessions."""
-        for session in self._sessions.values():
+        for sid, session in self._sessions.items():
+            if sid in self._lazy_sessions and not session._is_alive:
+                continue
             _ = await session.__aexit__(None, None, None)
 
         self._started = False