diff --git a/client/client.go b/client/client.go
index a6344371..ba1a8123 100644
--- a/client/client.go
+++ b/client/client.go
@@ -64,6 +64,7 @@ type QQClient struct {
 	lastMessageSeq int32
 	//lastMessageSeqTmp      sync.Map
 	msgSvcCache            *utils.Cache
+	transCache             *utils.Cache
 	lastLostMsg            string
 	groupMsgBuilders       sync.Map
 	onlinePushCache        []int16 // reset on reconnect
@@ -143,7 +144,8 @@ func NewClientMd5(uin int64, passwordMd5 [16]byte) *QQClient {
 		ksid:                   []byte("|454001228437590|A8.2.7.27f6ea96"),
 		eventHandlers:          &eventHandlers{},
 		groupListLock:          new(sync.Mutex),
-		msgSvcCache:            utils.NewCache(time.Second * 5),
+		msgSvcCache:            utils.NewCache(time.Second * 15),
+		transCache:             utils.NewCache(time.Second * 15),
 	}
 	rand.Read(cli.RandomKey)
 	return cli
@@ -905,7 +907,7 @@ func (c *QQClient) sendAndWait(seq uint16, pkt []byte) (interface{}, error) {
 		select {
 		case rsp := <-ch:
 			return rsp.Response, rsp.Error
-		case <-time.After(time.Second * 15):
+		case <-time.After(time.Second * 30):
 			retry++
 			if retry < 2 {
 				_ = c.send(pkt)
diff --git a/client/decoders.go b/client/decoders.go
index d7e93be6..cf505b2c 100644
--- a/client/decoders.go
+++ b/client/decoders.go
@@ -592,6 +592,11 @@ func decodeOnlinePushTransPacket(c *QQClient, _ uint16, payload []byte) (interfa
 		return nil, err
 	}
 	data := binary.NewReader(info.MsgData)
+	idStr := strconv.FormatInt(info.MsgUid, 10)
+	if _, ok := c.transCache.Get(idStr); ok {
+		return nil, nil
+	}
+	c.transCache.Add(idStr, "", time.Second*15)
 	if info.MsgType == 34 {
 		data.ReadInt32()
 		data.ReadByte()
@@ -599,37 +604,42 @@ func decodeOnlinePushTransPacket(c *QQClient, _ uint16, payload []byte) (interfa
 		typ := int32(data.ReadByte())
 		operator := int64(uint32(data.ReadInt32()))
 		if g := c.FindGroupByUin(info.FromUin); g != nil {
+			groupLeaveLock.Lock()
+			defer groupLeaveLock.Unlock()
 			switch typ {
+			case 0x02:
+				if target == c.Uin {
+					c.dispatchLeaveGroupEvent(&GroupLeaveEvent{Group: g})
+				} else {
+					if m := g.FindMember(target); m != nil {
+						g.removeMember(target)
+						c.dispatchMemberLeaveEvent(&MemberLeaveGroupEvent{
+							Group:  g,
+							Member: m,
+						})
+					}
+				}
 			case 0x03:
-				groupLeaveLock.Lock()
-				defer groupLeaveLock.Unlock()
 				if err = c.ReloadGroupList(); err != nil {
 					return nil, err
 				}
-				c.dispatchLeaveGroupEvent(&GroupLeaveEvent{
-					Group:    g,
-					Operator: g.FindMember(operator),
-				})
-			case 0x82:
-				if m := g.FindMember(target); m != nil {
-					g.removeMember(m.Uin)
-					c.dispatchMemberLeaveEvent(&MemberLeaveGroupEvent{
-						Group:  g,
-						Member: m,
-					})
-				}
-			case 0x83:
-				if m := g.FindMember(target); m != nil {
-					g.removeMember(m.Uin)
-					c.dispatchMemberLeaveEvent(&MemberLeaveGroupEvent{
+				if target == c.Uin {
+					c.dispatchLeaveGroupEvent(&GroupLeaveEvent{
 						Group:    g,
-						Member:   m,
 						Operator: g.FindMember(operator),
 					})
+				} else {
+					if m := g.FindMember(target); m != nil {
+						g.removeMember(target)
+						c.dispatchMemberLeaveEvent(&MemberLeaveGroupEvent{
+							Group:    g,
+							Member:   m,
+							Operator: g.FindMember(operator),
+						})
+					}
 				}
 			}
 		}
-
 	}
 	if info.MsgType == 44 {
 		data.ReadBytes(5)