diff --git a/src/AsyncWebSocket.cpp b/src/AsyncWebSocket.cpp
index 6b2f9e9..9ebab12 100644
--- a/src/AsyncWebSocket.cpp
+++ b/src/AsyncWebSocket.cpp
@@ -52,11 +52,15 @@ size_t webSocketSendFrameWindow(AsyncClient *client){
 }
 
 size_t webSocketSendFrame(AsyncClient *client, bool final, uint8_t opcode, bool mask, uint8_t *data, size_t len){
-  if(!client->canSend())
+  if(!client->canSend()) {
+    // Serial.println("SF 1");
     return 0;
+  }
   size_t space = client->space();
-  if(space < 2)
+  if(space < 2) {
+    // Serial.println("SF 2");
     return 0;
+  }
   uint8_t mbuf[4] = {0,0,0,0};
   uint8_t headLen = 2;
   if(len && mask){
@@ -68,8 +72,10 @@ size_t webSocketSendFrame(AsyncClient *client, bool final, uint8_t opcode, bool
   }
   if(len > 125)
     headLen += 2;
-  if(space < headLen)
+  if(space < headLen) {
+    // Serial.println("SF 2");
     return 0;
+  }
   space -= headLen;
 
   if(len > space) len = space;
@@ -77,6 +83,7 @@ size_t webSocketSendFrame(AsyncClient *client, bool final, uint8_t opcode, bool
   uint8_t *buf = (uint8_t*)malloc(headLen);
   if(buf == NULL){
     //os_printf("could not malloc %u bytes for frame header\n", headLen);
+    // Serial.println("SF 3");
     return 0;
   }
 
@@ -97,6 +104,7 @@ size_t webSocketSendFrame(AsyncClient *client, bool final, uint8_t opcode, bool
   if(client->add((const char *)buf, headLen) != headLen){
     //os_printf("error adding %lu header bytes\n", headLen);
     free(buf);
+    // Serial.println("SF 4");
     return 0;
   }
   free(buf);
@@ -109,13 +117,16 @@ size_t webSocketSendFrame(AsyncClient *client, bool final, uint8_t opcode, bool
     }
     if(client->add((const char *)data, len) != len){
       //os_printf("error adding %lu data bytes\n", len);
+      // Serial.println("SF 5");
       return 0;
     }
   }
   if(!client->send()){
     //os_printf("error sending frame: %lu\n", headLen+len);
+    // Serial.println("SF 6");
     return 0;
   }
+  // Serial.println("SF");
   return len;
 }
 
@@ -149,6 +160,7 @@ AsyncWebSocketMessageBuffer::AsyncWebSocketMessageBuffer(uint8_t * data, size_t
   _data = new uint8_t[_len + 1];
 
   if (_data) {
+    // Serial.println("BUFF alloc");
     memcpy(_data, data, _len);
     _data[_len] = 0;
   }
@@ -164,6 +176,7 @@ AsyncWebSocketMessageBuffer::AsyncWebSocketMessageBuffer(size_t size)
   _data = new uint8_t[_len + 1];
 
   if (_data) {
+    // Serial.println("BUFF alloc");
     _data[_len] = 0;
   }
 
@@ -185,6 +198,7 @@ AsyncWebSocketMessageBuffer::AsyncWebSocketMessageBuffer(const AsyncWebSocketMes
   }
 
   if (_data) {
+    // Serial.println("BUFF alloc");
     memcpy(_data, copy._data, _len);
     _data[_len] = 0;
   }
@@ -202,6 +216,7 @@ AsyncWebSocketMessageBuffer::AsyncWebSocketMessageBuffer(AsyncWebSocketMessageBu
   _count = 0;
 
   if (copy._data) {
+    // Serial.println("BUFF alloc");
     _data = copy._data;
     copy._data = nullptr;
   }
@@ -211,6 +226,7 @@ AsyncWebSocketMessageBuffer::AsyncWebSocketMessageBuffer(AsyncWebSocketMessageBu
 AsyncWebSocketMessageBuffer::~AsyncWebSocketMessageBuffer()
 {
     if (_data) {
+      // Serial.println("BUFF free");
       delete[] _data;
     }
 }
@@ -293,6 +309,7 @@ AsyncWebSocketBasicMessage::AsyncWebSocketBasicMessage(const char * data, size_t
   _opcode = opcode & 0x07;
   _mask = mask;
   _data = (uint8_t*)malloc(_len+1);
+  // Serial.println("MSG alloc");
   if(_data == NULL){
     _len = 0;
     _status = WS_MSG_ERROR;
@@ -316,35 +333,43 @@ AsyncWebSocketBasicMessage::AsyncWebSocketBasicMessage(uint8_t opcode, bool mask
 
 
 AsyncWebSocketBasicMessage::~AsyncWebSocketBasicMessage() {
-  if(_data != NULL)
+  if(_data != NULL) {
+    // Serial.println("MSG free");
     free(_data);
+  }
 }
 
  void AsyncWebSocketBasicMessage::ack(size_t len, uint32_t time)  {
    (void)time;
   _acked += len;
+  // Serial.printf("ACK %u = %u | %u = %u\n", _sent, _len, _acked, _ack);
   if(_sent == _len && _acked == _ack){
+    // Serial.println("ACK end");
     _status = WS_MSG_SENT;
   }
 }
  size_t AsyncWebSocketBasicMessage::send(AsyncClient *client)  {
-  if(_status != WS_MSG_SENDING)
+  if(_status != WS_MSG_SENDING){
+    // Serial.println("MS 1");
     return 0;
+  }
   if(_acked < _ack){
+    //  Serial.println("MS 2");
     return 0;
   }
   if(_sent == _len){
-    if(_acked == _ack)
-      _status = WS_MSG_SENT;
+    //  Serial.println("MS 3");
+     _status = WS_MSG_SENT;
     return 0;
   }
   if(_sent > _len){
+    //  Serial.println("MS 4");
       _status = WS_MSG_ERROR;
       return 0;
   }
-
   size_t toSend = _len - _sent;
   size_t window = webSocketSendFrameWindow(client);
+  // Serial.printf("Send %u %u %u\n", _len, _sent, toSend);
 
   if(window < toSend) {
       toSend = window;
@@ -360,8 +385,14 @@ AsyncWebSocketBasicMessage::~AsyncWebSocketBasicMessage() {
   size_t sent = webSocketSendFrame(client, final, opCode, _mask, dPtr, toSend);
   _status = WS_MSG_SENDING;
   if(toSend && sent != toSend){
-      _sent -= (toSend - sent);
-      _ack -= (toSend - sent);
+      size_t delta = (toSend - sent);
+      // Serial.printf("\ns:%u a:%u d:%u\n", _sent, _ack, delta);
+      _sent -= delta;
+      _ack -= delta + ((delta < 126)?2:4) + (_mask * 4);
+      // Serial.printf("s:%u a:%u\n", _sent, _ack);
+      if (!sent) {
+        _status = WS_MSG_ERROR;
+      }
   }
   return sent;
 }
@@ -399,11 +430,13 @@ AsyncWebSocketMultiMessage::AsyncWebSocketMultiMessage(AsyncWebSocketMessageBuff
   if (buffer) {
     _WSbuffer = buffer;
     (*_WSbuffer)++;
+    //  Serial.printf("INC WSbuffer == %u\n", _WSbuffer->count());
     _data = buffer->get();
     _len = buffer->length();
     _status = WS_MSG_SENDING;
     //ets_printf("M: %u\n", _len);
   } else {
+    // Serial.println("BUFF ERROR");
     _status = WS_MSG_ERROR;
   }
 
@@ -413,40 +446,48 @@ AsyncWebSocketMultiMessage::AsyncWebSocketMultiMessage(AsyncWebSocketMessageBuff
 AsyncWebSocketMultiMessage::~AsyncWebSocketMultiMessage() {
   if (_WSbuffer) {
     (*_WSbuffer)--; // decreases the counter.
+    // Serial.printf("DEC WSbuffer == %u\n", _WSbuffer->count());
   }
 }
 
  void AsyncWebSocketMultiMessage::ack(size_t len, uint32_t time)  {
    (void)time;
   _acked += len;
+  // Serial.printf("ACK %u = %u | %u = %u\n", _sent, _len, _acked, _ack);
   if(_sent >= _len && _acked >= _ack){
+    // Serial.println("ACK end");
     _status = WS_MSG_SENT;
   }
   //ets_printf("A: %u\n", len);
 }
  size_t AsyncWebSocketMultiMessage::send(AsyncClient *client)  {
-  if(_status != WS_MSG_SENDING)
+  if(_status != WS_MSG_SENDING) {
+    // Serial.println("MS 1");
     return 0;
+  }
   if(_acked < _ack){
+    // Serial.println("MS 2");
     return 0;
   }
   if(_sent == _len){
+    // Serial.println("MS 3");
     _status = WS_MSG_SENT;
     return 0;
   }
   if(_sent > _len){
+    // Serial.println("MS 4");
       _status = WS_MSG_ERROR;
       //ets_printf("E: %u > %u\n", _sent, _len);
       return 0;
   }
-
   size_t toSend = _len - _sent;
   size_t window = webSocketSendFrameWindow(client);
+  // Serial.printf("Send %u %u %u\n", _len, _sent, toSend);
 
   if(window < toSend) {
       toSend = window;
   }
-
+  // Serial.printf("s:%u a:%u t:%u\n", _sent, _ack, toSend);
   _sent += toSend;
   _ack += toSend + ((toSend < 126)?2:4) + (_mask * 4);
 
@@ -460,8 +501,14 @@ AsyncWebSocketMultiMessage::~AsyncWebSocketMultiMessage() {
   _status = WS_MSG_SENDING;
   if(toSend && sent != toSend){
       //ets_printf("E: %u != %u\n", toSend, sent);
-      _sent -= (toSend - sent);
-      _ack -= (toSend - sent);
+      size_t delta = (toSend - sent);
+      // Serial.printf("\ns:%u a:%u d:%u\n", _sent, _ack, delta);
+      _sent -= delta;
+      _ack -= delta + ((delta < 126)?2:4) + (_mask * 4);
+      // Serial.printf("s:%u a:%u\n", _sent, _ack);
+      if (!sent) {
+        _status = WS_MSG_ERROR;
+      }
   }
   //ets_printf("S: %u %u\n", _sent, sent);
   return sent;
@@ -496,16 +543,25 @@ AsyncWebSocketClient::AsyncWebSocketClient(AsyncWebServerRequest *request, Async
   _server->_addClient(this);
   _server->_handleEvent(this, WS_EVT_CONNECT, request, NULL, 0);
   delete request;
-  memset(&_pinfo,0,sizeof(_pinfo)); //
+  memset(&_pinfo,0,sizeof(_pinfo));
 }
 
 AsyncWebSocketClient::~AsyncWebSocketClient(){
+  // Serial.printf("%u FREE Q\n", id());
   _messageQueue.free();
   _controlQueue.free();
+  _server->_cleanBuffers();
   _server->_handleEvent(this, WS_EVT_DISCONNECT, NULL, NULL, 0);
 }
 
+void AsyncWebSocketClient::_clearQueue(){
+  while(!_messageQueue.isEmpty() && _messageQueue.front()->finished()){
+    _messageQueue.remove(_messageQueue.front());
+  }
+}
+
 void AsyncWebSocketClient::_onAck(size_t len, uint32_t time){
+  // Serial.printf("%u onAck\n", id());
   _lastMessageTime = millis();
   if(!_controlQueue.isEmpty()){
     auto head = _controlQueue.front();
@@ -520,15 +576,21 @@ void AsyncWebSocketClient::_onAck(size_t len, uint32_t time){
       _controlQueue.remove(head);
     }
   }
+
   if(len && !_messageQueue.isEmpty()){
     _messageQueue.front()->ack(len, time);
   }
+
+  _clearQueue();
+
   _server->_cleanBuffers();
+  // Serial.println("RUN 1");
   _runQueue();
 }
 
 void AsyncWebSocketClient::_onPoll(){
   if(_client->canSend() && (!_controlQueue.isEmpty() || !_messageQueue.isEmpty())){
+    // Serial.println("RUN 2");
     _runQueue();
   } else if(_keepAlivePeriod > 0 && _controlQueue.isEmpty() && _messageQueue.isEmpty() && (millis() - _lastMessageTime) >= _keepAlivePeriod){
     ping((uint8_t *)AWSC_PING_PAYLOAD, AWSC_PING_PAYLOAD_LEN);
@@ -536,15 +598,20 @@ void AsyncWebSocketClient::_onPoll(){
 }
 
 void AsyncWebSocketClient::_runQueue(){
-  while(!_messageQueue.isEmpty() && _messageQueue.front()->finished()){
-    _messageQueue.remove(_messageQueue.front());
-  }
+  _clearQueue();
 
+  //size_t m0 = _messageQueue.isEmpty()? 0 : _messageQueue.length();
+  //size_t m1 = _messageQueue.isEmpty()? 0 : _messageQueue.front()->betweenFrames();
+  // Serial.printf("%u R C = %u %u\n", _clientId, m0, m1);
   if(!_controlQueue.isEmpty() && (_messageQueue.isEmpty() || _messageQueue.front()->betweenFrames()) && webSocketSendFrameWindow(_client) > (size_t)(_controlQueue.front()->len() - 1)){
+    //  Serial.printf("%u R S C\n", _clientId);
     _controlQueue.front()->send(_client);
   } else if(!_messageQueue.isEmpty() && _messageQueue.front()->betweenFrames() && webSocketSendFrameWindow(_client)){
+    //  Serial.printf("%u R S M = ", _clientId);
     _messageQueue.front()->send(_client);
   }
+
+  _clearQueue();
 }
 
 bool AsyncWebSocketClient::queueIsFull(){
@@ -553,28 +620,38 @@ bool AsyncWebSocketClient::queueIsFull(){
 }
 
 void AsyncWebSocketClient::_queueMessage(AsyncWebSocketMessage *dataMessage){
-  if(dataMessage == NULL)
+  if(dataMessage == NULL){
+    // Serial.printf("%u Q1\n", _clientId);
     return;
+  }
   if(_status != WS_CONNECTED){
+    // Serial.printf("%u Q2\n", _clientId);
     delete dataMessage;
     return;
   }
   if(_messageQueue.length() >= WS_MAX_QUEUED_MESSAGES){
       ets_printf(String(F("ERROR: Too many messages queued\n")).c_str());
+      // Serial.printf("%u Q3\n", _clientId);
       delete dataMessage;
   } else {
       _messageQueue.add(dataMessage);
+      // Serial.printf("%u Q A %u\n", _clientId, _messageQueue.length());
   }
-  if(_client->canSend())
+  if(_client->canSend()) {
+    // Serial.printf("%u Q S\n", _clientId);
+    // Serial.println("RUN 3");
     _runQueue();
+  }
 }
 
 void AsyncWebSocketClient::_queueControl(AsyncWebSocketControl *controlMessage){
   if(controlMessage == NULL)
     return;
   _controlQueue.add(controlMessage);
-  if(_client->canSend())
+  if(_client->canSend()) {
+    // Serial.println("RUN 4");
     _runQueue();
+  }
 }
 
 void AsyncWebSocketClient::close(uint16_t code, const char * message){
@@ -607,19 +684,24 @@ void AsyncWebSocketClient::ping(uint8_t *data, size_t len){
     _queueControl(new AsyncWebSocketControl(WS_PING, data, len));
 }
 
-void AsyncWebSocketClient::_onError(int8_t){}
+void AsyncWebSocketClient::_onError(int8_t){
+	//Serial.println("onErr");
+}
 
 void AsyncWebSocketClient::_onTimeout(uint32_t time){
+  // Serial.println("onTime");
   (void)time;
   _client->close(true);
 }
 
 void AsyncWebSocketClient::_onDisconnect(){
+  // Serial.println("onDis");
   _client = NULL;
   _server->_handleDisconnect(this);
 }
 
 void AsyncWebSocketClient::_onData(void *pbuf, size_t plen){
+  // Serial.println("onData");
   _lastMessageTime = millis();
   uint8_t *data = (uint8_t*)pbuf;
   while(plen > 0){
@@ -959,6 +1041,7 @@ void AsyncWebSocket::textAll(AsyncWebSocketMessageBuffer * buffer){
 
 
 void AsyncWebSocket::textAll(const char * message, size_t len){
+  //if (_buffers.length()) return;
   AsyncWebSocketMessageBuffer * WSBuffer = makeBuffer((uint8_t *)message, len);
     textAll(WSBuffer);
 }
@@ -1231,6 +1314,7 @@ AsyncWebSocketMessageBuffer * AsyncWebSocket::makeBuffer(uint8_t * data, size_t
 
   if (buffer) {
     AsyncWebLockGuard l(_lock);
+    // Serial.printf("Add to global buffers = %u\n", _buffers.length() + 1);
     _buffers.add(buffer);
   }
 
@@ -1240,9 +1324,9 @@ AsyncWebSocketMessageBuffer * AsyncWebSocket::makeBuffer(uint8_t * data, size_t
 void AsyncWebSocket::_cleanBuffers()
 {
   AsyncWebLockGuard l(_lock);
-
   for(AsyncWebSocketMessageBuffer * c: _buffers){
     if(c && c->canDelete()){
+        // Serial.printf("Remove from global buffers = %u\n", _buffers.length() - 1);
         _buffers.remove(c);
     }
   }
diff --git a/src/AsyncWebSocket.h b/src/AsyncWebSocket.h
index f06af2c..5ebf1cc 100644
--- a/src/AsyncWebSocket.h
+++ b/src/AsyncWebSocket.h
@@ -84,16 +84,16 @@ class AsyncWebSocketMessageBuffer {
   private:
     uint8_t * _data;
     size_t _len;
-    bool _lock; 
-    uint32_t _count;  
+    bool _lock;
+    uint32_t _count;
 
   public:
     AsyncWebSocketMessageBuffer();
     AsyncWebSocketMessageBuffer(size_t size);
-    AsyncWebSocketMessageBuffer(uint8_t * data, size_t size); 
-    AsyncWebSocketMessageBuffer(const AsyncWebSocketMessageBuffer &); 
-    AsyncWebSocketMessageBuffer(AsyncWebSocketMessageBuffer &&); 
-    ~AsyncWebSocketMessageBuffer(); 
+    AsyncWebSocketMessageBuffer(uint8_t * data, size_t size);
+    AsyncWebSocketMessageBuffer(const AsyncWebSocketMessageBuffer &);
+    AsyncWebSocketMessageBuffer(AsyncWebSocketMessageBuffer &&);
+    ~AsyncWebSocketMessageBuffer();
     void operator ++(int i) { (void)i; _count++; }
     void operator --(int i) { (void)i; if (_count > 0) { _count--; } ;  }
     bool reserve(size_t size);
@@ -102,9 +102,9 @@ class AsyncWebSocketMessageBuffer {
     uint8_t * get() { return _data; }
     size_t length() { return _len; }
     uint32_t count() { return _count; }
-    bool canDelete() { return (!_count && !_lock); } 
+    bool canDelete() { return (!_count && !_lock); }
 
-    friend AsyncWebSocket; 
+    friend AsyncWebSocket;
 
 };
 
@@ -145,9 +145,9 @@ class AsyncWebSocketMultiMessage: public AsyncWebSocketMessage {
     size_t _sent;
     size_t _ack;
     size_t _acked;
-    AsyncWebSocketMessageBuffer * _WSbuffer; 
+    AsyncWebSocketMessageBuffer * _WSbuffer;
 public:
-    AsyncWebSocketMultiMessage(AsyncWebSocketMessageBuffer * buffer, uint8_t opcode=WS_TEXT, bool mask=false); 
+    AsyncWebSocketMultiMessage(AsyncWebSocketMessageBuffer * buffer, uint8_t opcode=WS_TEXT, bool mask=false);
     virtual ~AsyncWebSocketMultiMessage() override;
     virtual bool betweenFrames() const override { return _acked == _ack; }
     virtual void ack(size_t len, uint32_t time) override ;
@@ -173,6 +173,7 @@ class AsyncWebSocketClient {
     void _queueMessage(AsyncWebSocketMessage *dataMessage);
     void _queueControl(AsyncWebSocketControl *controlMessage);
     void _runQueue();
+    void _clearQueue();
 
   public:
     void *_tempObject;
@@ -205,6 +206,7 @@ class AsyncWebSocketClient {
     //data packets
     void message(AsyncWebSocketMessage *message){ _queueMessage(message); }
     bool queueIsFull();
+    size_t queueLen() { return _messageQueue.length() + _controlQueue.length(); }
 
     size_t printf(const char *format, ...)  __attribute__ ((format (printf, 2, 3)));
 #ifndef ESP32
@@ -216,7 +218,7 @@ class AsyncWebSocketClient {
     void text(char * message);
     void text(const String &message);
     void text(const __FlashStringHelper *data);
-    void text(AsyncWebSocketMessageBuffer *buffer); 
+    void text(AsyncWebSocketMessageBuffer *buffer);
 
     void binary(const char * message, size_t len);
     void binary(const char * message);
@@ -224,7 +226,7 @@ class AsyncWebSocketClient {
     void binary(char * message);
     void binary(const String &message);
     void binary(const __FlashStringHelper *data, size_t len);
-    void binary(AsyncWebSocketMessageBuffer *buffer); 
+    void binary(AsyncWebSocketMessageBuffer *buffer);
 
     bool canSend() { return _messageQueue.length() < WS_MAX_QUEUED_MESSAGES; }
 
@@ -286,7 +288,7 @@ class AsyncWebSocket: public AsyncWebHandler {
     void textAll(char * message);
     void textAll(const String &message);
     void textAll(const __FlashStringHelper *message); //  need to convert
-    void textAll(AsyncWebSocketMessageBuffer * buffer); 
+    void textAll(AsyncWebSocketMessageBuffer * buffer);
 
     void binary(uint32_t id, const char * message, size_t len);
     void binary(uint32_t id, const char * message);
@@ -301,7 +303,7 @@ class AsyncWebSocket: public AsyncWebHandler {
     void binaryAll(char * message);
     void binaryAll(const String &message);
     void binaryAll(const __FlashStringHelper *message, size_t len);
-    void binaryAll(AsyncWebSocketMessageBuffer * buffer); 
+    void binaryAll(AsyncWebSocketMessageBuffer * buffer);
 
     void message(uint32_t id, AsyncWebSocketMessage *message);
     void messageAll(AsyncWebSocketMultiMessage *message);
@@ -332,11 +334,11 @@ class AsyncWebSocket: public AsyncWebHandler {
     virtual void handleRequest(AsyncWebServerRequest *request) override final;
 
 
-    //  messagebuffer functions/objects. 
-    AsyncWebSocketMessageBuffer * makeBuffer(size_t size = 0); 
-    AsyncWebSocketMessageBuffer * makeBuffer(uint8_t * data, size_t size); 
+    //  messagebuffer functions/objects.
+    AsyncWebSocketMessageBuffer * makeBuffer(size_t size = 0);
+    AsyncWebSocketMessageBuffer * makeBuffer(uint8_t * data, size_t size);
     LinkedList<AsyncWebSocketMessageBuffer *> _buffers;
-    void _cleanBuffers(); 
+    void _cleanBuffers();
 
     AsyncWebSocketClientLinkedList getClients() const;
 };