diff --git a/listener/anytls/server.go b/listener/anytls/server.go
index f89f2277..667e8777 100644
--- a/listener/anytls/server.go
+++ b/listener/anytls/server.go
@@ -177,6 +177,6 @@ func (l *Listener) HandleConn(conn net.Conn, h *sing.ListenerHandler) {
 			Destination: destination,
 		})
 	}, &l.padding)
-	session.Run(true)
+	session.Run()
 	session.Close()
 }
diff --git a/transport/anytls/session/client.go b/transport/anytls/session/client.go
index 869a4b31..2312a6ff 100644
--- a/transport/anytls/session/client.go
+++ b/transport/anytls/session/client.go
@@ -123,7 +123,7 @@ func (c *Client) createSession(ctx context.Context) (*Session, error) {
 		c.idleSession.Remove(math.MaxUint64 - session.seq)
 		c.idleSessionLock.Unlock()
 	}
-	session.Run(false)
+	session.Run()
 	return session, nil
 }
 
diff --git a/transport/anytls/session/session.go b/transport/anytls/session/session.go
index ce4d580f..946ae9f2 100644
--- a/transport/anytls/session/session.go
+++ b/transport/anytls/session/session.go
@@ -36,10 +36,11 @@ type Session struct {
 	padding   *atomic.TypedValue[*padding.PaddingFactory]
 
 	// client
-	isClient   bool
-	buffering  bool
-	buffer     []byte
-	pktCounter atomic.Uint32
+	isClient    bool
+	sendPadding bool
+	buffering   bool
+	buffer      []byte
+	pktCounter  atomic.Uint32
 
 	// server
 	onNewStream func(stream *Stream)
@@ -47,9 +48,10 @@ type Session struct {
 
 func NewClientSession(conn net.Conn, _padding *atomic.TypedValue[*padding.PaddingFactory]) *Session {
 	s := &Session{
-		conn:     conn,
-		isClient: true,
-		padding:  _padding,
+		conn:        conn,
+		isClient:    true,
+		sendPadding: true,
+		padding:     _padding,
 	}
 	s.die = make(chan struct{})
 	s.streams = make(map[uint32]*Stream)
@@ -60,7 +62,6 @@ func NewServerSession(conn net.Conn, onNewStream func(stream *Stream), _padding
 	s := &Session{
 		conn:        conn,
 		onNewStream: onNewStream,
-		isClient:    false,
 		padding:     _padding,
 	}
 	s.die = make(chan struct{})
@@ -68,8 +69,8 @@ func NewServerSession(conn net.Conn, onNewStream func(stream *Stream), _padding
 	return s
 }
 
-func (s *Session) Run(isServer bool) {
-	if isServer {
+func (s *Session) Run() {
+	if !s.isClient {
 		s.recvLoop()
 		return
 	}
@@ -319,7 +320,7 @@ func (s *Session) writeConn(b []byte) (n int, err error) {
 	}
 
 	// calulate & send padding
-	if s.isClient {
+	if s.sendPadding {
 		pkt := s.pktCounter.Add(1)
 		paddingF := s.padding.Load()
 		if pkt < paddingF.Stop {
@@ -333,7 +334,6 @@ func (s *Session) writeConn(b []byte) (n int, err error) {
 						continue
 					}
 				}
-				// logrus.Debugln(pkt, "write", l, "len", remainPayloadLen, "remain", remainPayloadLen-l)
 				if remainPayloadLen > l { // this packet is all payload
 					_, err = s.conn.Write(b[:l])
 					if err != nil {
@@ -371,7 +371,12 @@ func (s *Session) writeConn(b []byte) (n int, err error) {
 			// maybe still remain payload to write
 			if len(b) == 0 {
 				return
+			} else {
+				n2, err := s.conn.Write(b)
+				return n + n2, err
 			}
+		} else {
+			s.sendPadding = false
 		}
 	}