diff --git a/client/src/telethon/_impl/client/client/net.py b/client/src/telethon/_impl/client/client/net.py
index c5f5b4d8..075f21fb 100644
--- a/client/src/telethon/_impl/client/client/net.py
+++ b/client/src/telethon/_impl/client/client/net.py
@@ -167,14 +167,10 @@ async def connect_sender(
     return sender, session_dcs
 
 
-async def connect(self: Client, reconnect: bool = False) -> None:
-    if self._sender and not reconnect:
+async def connect(self: Client) -> None:
+    if self._sender:
         return
 
-    if reconnect:
-        assert self._sender
-        await self._sender.disconnect()
-
     if session := await self._storage.load():
         self._session = session
 
@@ -185,7 +181,7 @@ async def connect(self: Client, reconnect: bool = False) -> None:
         self._config, self._session.dcs, datacenter
     )
 
-    if reconnect or (self._message_box.is_empty() and self._session.user):
+    if self._message_box.is_empty() and self._session.user:
         try:
             await self(functions.updates.get_state())
         except RpcError as e:
@@ -201,8 +197,7 @@ async def connect(self: Client, reconnect: bool = False) -> None:
                 id=me.id, dc=self._sender.dc_id, bot=me.bot, username=me.username
             )
 
-    if not self._dispatcher or self._dispatcher.done():
-        self._dispatcher = asyncio.create_task(dispatcher(self))
+    self._dispatcher = asyncio.create_task(dispatcher(self))
 
 
 async def disconnect(self: Client) -> None:
@@ -271,9 +266,6 @@ async def step_sender(client: Client) -> None:
     try:
         assert client._sender
         updates = await client._sender.step_updates()
-    except ConnectionResetError:
-        await connect(client, reconnect=True)
-        return
     except ConnectionError:
         if client.connected:
             raise
diff --git a/client/src/telethon/_impl/mtsender/sender.py b/client/src/telethon/_impl/mtsender/sender.py
index 5da2bd18..0ef59f6a 100644
--- a/client/src/telethon/_impl/mtsender/sender.py
+++ b/client/src/telethon/_impl/mtsender/sender.py
@@ -163,6 +163,7 @@ class Sender:
     dc_id: int
     addr: str
     _logger: logging.Logger
+    _lock: Lock
     _reader: AsyncReader
     _writer: AsyncWriter
     _transport: Transport
@@ -172,7 +173,6 @@ class Sender:
     _requests: list[Request[object]]
     _request_event: Event
     _read_buffer: bytearray
-    _step_lock: Lock
     _step_counter: int
     _recv_task: Optional[Task[bytes]] = None
     _send_task: Optional[Task[None]] = None
@@ -195,6 +195,7 @@ class Sender:
             dc_id=dc_id,
             addr=addr,
             _logger=base_logger.getChild("mtsender"),
+            _lock=Lock(),
             _reader=reader,
             _writer=writer,
             _transport=transport,
@@ -204,7 +205,6 @@ class Sender:
             _requests=[],
             _request_event=Event(),
             _read_buffer=bytearray(),
-            _step_lock=Lock(),
             _step_counter=0,
         )
 
@@ -212,7 +212,9 @@ class Sender:
         assert self._recv_task
         assert self._send_task
         recv_task, send_task = self._recv_task, self._send_task
-        self._recv_task, self._send_task = None, None
+
+        async with self._lock:
+            self._recv_task, self._send_task = None, None
 
         recv_task.cancel()
         send_task.cancel()
@@ -251,7 +253,7 @@ class Sender:
 
     async def step(self) -> None:
         ticket_number = self._step_counter
-        async with self._step_lock:
+        async with self._lock:
             if self._step_counter == ticket_number:
                 # We're the one to drive IO.
                 await self._step()