diff --git a/packages/node_modules/@node-red/nodes/core/network/31-tcpin.js b/packages/node_modules/@node-red/nodes/core/network/31-tcpin.js
index d95d03b10..7cf34f4f8 100644
--- a/packages/node_modules/@node-red/nodes/core/network/31-tcpin.js
+++ b/packages/node_modules/@node-red/nodes/core/network/31-tcpin.js
@@ -547,10 +547,16 @@ module.exports = function(RED) {
 
         this.on("input", function(msg, nodeSend, nodeDone) {
             var i = 0;
-            if ((!Buffer.isBuffer(msg.payload)) && (typeof msg.payload !== "string")) {
+            if (msg.payload !== undefined && (!Buffer.isBuffer(msg.payload)) && (typeof msg.payload !== "string")) {
                 msg.payload = msg.payload.toString();
             }
 
+            if (node.out === "sit" && msg?.reset === true && node?.last_id && clients[node.last_id]) {
+                node.status({});
+                clients[node.last_id].client.destroy();
+                delete clients[node.last_id];
+            }
+
             var host = node.server || msg.host;
             var port = node.port || msg.port;
 
@@ -627,7 +633,9 @@ module.exports = function(RED) {
                             clients[connection_id].connecting = false;
                             let event;
                             while (event = dequeue(clients[connection_id].msgQueue)) {
-                                clients[connection_id].client.write(event.msg.payload);
+                                if (event.msg.payload !== undefined) {
+                                    clients[connection_id].client.write(event.msg.payload);
+                                }
                                 event.nodeDone();
                             }
                             if (node.out === "time" && node.splitc < 0) {