diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt
index ae2921bb9..86c6048f3 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/QQAndroidBotNetworkHandler.kt
@@ -312,19 +312,16 @@ internal class QQAndroidBotNetworkHandler(bot: QQAndroidBot) : BotNetworkHandler
             val rawInput = try {
                 channel.read()
             } catch (e: ClosedChannelException) {
-                close()
                 bot.tryReinitializeNetworkHandler(e)
                 return
             } catch (e: ReadPacketInternalException) {
                 bot.logger.error("Socket channel read failed: ${e.message}")
-                close()
                 bot.tryReinitializeNetworkHandler(e)
                 return
             } catch (e: CancellationException) {
                 return
             } catch (e: Throwable) {
                 bot.logger.error("Caught unexpected exceptions", e)
-                close()
                 bot.tryReinitializeNetworkHandler(e)
                 return
             }
diff --git a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/chat/receive/MessageSvc.kt b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/chat/receive/MessageSvc.kt
index 875858b11..b34eaf445 100644
--- a/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/chat/receive/MessageSvc.kt
+++ b/mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/network/protocol/packet/chat/receive/MessageSvc.kt
@@ -25,6 +25,7 @@ import net.mamoe.mirai.qqandroid.network.protocol.packet.buildOutgoingUniPacket
 import net.mamoe.mirai.qqandroid.utils.toMessageChain
 import net.mamoe.mirai.qqandroid.utils.toRichTextElems
 import net.mamoe.mirai.utils.cryptor.contentToString
+import net.mamoe.mirai.utils.currentTimeSeconds
 import net.mamoe.mirai.utils.io.hexToBytes
 import net.mamoe.mirai.utils.io.toReadPacket
 import kotlin.math.absoluteValue
@@ -162,8 +163,9 @@ internal class MessageSvc {
                         )
                     ),
                     msgSeq = client.atomicNextMessageSequenceId(),
-                    msgRand = Random.nextInt().absoluteValue
-                    // syncCookie = client.c2cMessageSync.syncCookie.takeIf { it.isNotEmpty() } ?: "08 92 C2 C4 F1 05 10 92 C2 C4 F1 05 18 E6 ED B9 C3 02 20 89 FE BE A4 06 28 89 84 F9 A2 06 48 DE 8C EA E5 0E 58 D9 BD BB A0 09 60 1D 68 92 C2 C4 F1 05 70 00".hexToBytes(),
+                    msgRand = Random.nextInt().absoluteValue,
+                    syncCookie = client.c2cMessageSync.syncCookie?.takeIf { it.isNotEmpty() }
+                        ?: SyncCookie(currentTimeSeconds).toByteArray(SyncCookie.serializer())
                     // msgVia = 1
                 )
             )
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt
index 52973abbe..b05997de8 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/BotImpl.kt
@@ -6,6 +6,7 @@ import kotlinx.coroutines.*
 import net.mamoe.mirai.event.broadcast
 import net.mamoe.mirai.event.events.BotOfflineEvent
 import net.mamoe.mirai.network.BotNetworkHandler
+import net.mamoe.mirai.network.closeAndJoin
 import net.mamoe.mirai.utils.*
 import net.mamoe.mirai.utils.io.logStacktrace
 import kotlin.coroutines.CoroutineContext
@@ -92,7 +93,7 @@ abstract class BotImpl<N : BotNetworkHandler> constructor(
         try {
             if (::_network.isInitialized) {
                 BotOfflineEvent(this).broadcast()
-                _network.close(cause)
+                _network.closeAndJoin(cause)
             }
         } catch (e: Exception) {
             logger.error("Cannot close network handler", e)
@@ -105,22 +106,26 @@ abstract class BotImpl<N : BotNetworkHandler> constructor(
                 break@loginLoop
             } catch (e: Exception) {
                 e.logStacktrace()
-                _network.close(e)
+                _network.closeAndJoin(e)
             }
             logger.warning("Login failed. Retrying in 3s...")
             delay(3000)
         }
 
-        while (true) {
-            try {
-                return _network.init()
-            } catch (e: Exception) {
-                e.logStacktrace()
-                _network.close(e)
+        repeat(1) block@{
+            repeat(2) {
+                try {
+                    _network.init()
+                    return@block
+                } catch (e: Exception) {
+                    e.logStacktrace()
+                }
+                logger.warning("Init failed. Retrying in 3s...")
+                delay(3000)
             }
-            logger.warning("Init failed. Retrying in 3s...")
-            delay(3000)
+            logger.error("cannot init. some features may be affected")
         }
+
     }
 
     protected abstract fun createNetworkHandler(coroutineContext: CoroutineContext): N
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/BotNetworkHandler.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/BotNetworkHandler.kt
index ee8d11a5a..5ba71e7b5 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/BotNetworkHandler.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/BotNetworkHandler.kt
@@ -73,4 +73,9 @@ abstract class BotNetworkHandler : CoroutineScope {
             }
         }
     }
+}
+
+suspend fun BotNetworkHandler.closeAndJoin(cause: Throwable? = null){
+    this.close(cause)
+    this.supervisor.join()
 }
\ No newline at end of file