Do a deepcopy to ensure we match sessions

Author: EvieePy

starlette_plus/middleware/sessions.py

@@ -16,6 +16,7 @@
 from __future__ import annotations
 
 import base64
+import copy
 import datetime
 import hashlib
 import json
@@ -121,7 +122,7 @@ async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
         except (KeyError, itsdangerous.BadSignature):
             session = {}
 
-        original: dict[str, Any] = session.copy()
+        original: dict[str, Any] = copy.deepcopy(session)
         scope["session"] = session
 
         async def wrapper(message: Message) -> None: