diff --git a/MinecraftClient/Protocol/Handlers/Protocol18.cs b/MinecraftClient/Protocol/Handlers/Protocol18.cs
index 84c7baac..b9128587 100644
--- a/MinecraftClient/Protocol/Handlers/Protocol18.cs
+++ b/MinecraftClient/Protocol/Handlers/Protocol18.cs
@@ -4587,7 +4587,10 @@ namespace MinecraftClient.Protocol.Handlers
                 
                 if(protocolVersion >= MC_1_14_Version)
                     packet.Add(0); // insideBlock = false
-                
+
+                if (protocolVersion >= MC_1_21_2_Version)
+                    packet.Add(0); // worldBorderHit = false
+
                 if (protocolVersion >= MC_1_19_Version)
                     packet.AddRange(DataTypes.GetVarInt(sequenceId));
                 
diff --git a/MinecraftClient/Protocol/Handlers/SocketWrapper.cs b/MinecraftClient/Protocol/Handlers/SocketWrapper.cs
index 338bcd46..a4f451b1 100644
--- a/MinecraftClient/Protocol/Handlers/SocketWrapper.cs
+++ b/MinecraftClient/Protocol/Handlers/SocketWrapper.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Net.Sockets;
 using MinecraftClient.Crypto;
 
@@ -90,6 +90,9 @@ namespace MinecraftClient.Protocol.Handlers
         /// <param name="buffer">data to send</param>
         public void SendDataRAW(byte[] buffer)
         {
+            if (!IsConnected())
+                throw new SocketException((int)SocketError.NotConnected);
+
             if (encrypted)
                 s!.Write(buffer, 0, buffer.Length);
             else