diff --git a/include/async_mqtt/impl/endpoint_close.hpp b/include/async_mqtt/impl/endpoint_close.hpp
index 24bdea909..0b79e42f4 100644
--- a/include/async_mqtt/impl/endpoint_close.hpp
+++ b/include/async_mqtt/impl/endpoint_close.hpp
@@ -51,7 +51,7 @@ close_op {
                 ASYNC_MQTT_LOG("mqtt_impl", trace)
                     << ASYNC_MQTT_ADD_VALUE(address, &a_ep)
                     << "already close requested";
-              a_ep.close_queue_.post(
+                a_ep.close_queue_.post(
                     force_move(self)
                 );
             } break;
diff --git a/include/async_mqtt/predefined_layer/customized_ssl_stream.hpp b/include/async_mqtt/predefined_layer/customized_ssl_stream.hpp
index 3a98c479f..0be45bd8a 100644
--- a/include/async_mqtt/predefined_layer/customized_ssl_stream.hpp
+++ b/include/async_mqtt/predefined_layer/customized_ssl_stream.hpp
@@ -68,60 +68,41 @@ struct layer_customize<as::ssl::stream<NextLayer>> {
                 stream.get_executor(),
                 shutdown_timeout
             );
-            auto self_sp = std::make_shared<Self>(force_move(self));
+            auto sig = std::make_shared<as::cancellation_signal>();
             tim->async_wait(
-                as::consign(
-                    as::append(
-                        std::ref(*self_sp),
-                        std::weak_ptr<as::steady_timer>(tim)
-                    ),
-                    self_sp
-                )
+                [sig, wp = std::weak_ptr<as::steady_timer>(tim)]
+                (error_code const& ec) {
+                    if (!ec) {
+                        if (auto sp = wp.lock()) {
+                            ASYNC_MQTT_LOG("mqtt_impl", info)
+                                << "TLS async_shutdown timeout";
+                            sig->emit(as::cancellation_type::terminal);
+                        }
+                    }
+                }
             );
-            stream.async_shutdown(
-                as::consign(
-                    std::ref(*self_sp),
-                    self_sp,
-                    tim
+            auto& a_stream{stream};
+            a_stream.async_shutdown(
+                as::bind_cancellation_slot(
+                    sig->slot(),
+                    as::consign(
+                        force_move(self),
+                        tim,
+                        sig
+                    )
                 )
             );
         }
 
-        template <typename Self>
-        void operator()(
-            Self& self,
-            error_code const& ec,
-            std::weak_ptr<as::steady_timer> wp
-        ) {
-            if (!ec) {
-                if (auto sp = wp.lock()) {
-                    ASYNC_MQTT_LOG("mqtt_impl", info)
-                        << "TLS async_shutdown timeout";
-                    BOOST_ASSERT(state == shutdown);
-                    state = complete;
-                    self.complete(ec);
-                    return;
-                }
-            }
-            ASYNC_MQTT_LOG("mqtt_impl", info)
-                << "TLS async_shutdown timeout doesn't processed. ec:" << ec.message();
-        }
-
         template <typename Self>
         void operator()(
             Self& self,
             error_code const& ec
         ) {
-            if (state == complete) {
-                ASYNC_MQTT_LOG("mqtt_impl", info)
-                    << "TLS async_shutdown already timeout";
-            }
-            else {
-                ASYNC_MQTT_LOG("mqtt_impl", info)
-                    << "TLS async_shutdown ec:" << ec.message();
-                state = complete;
-                self.complete(ec);
-            }
+            ASYNC_MQTT_LOG("mqtt_impl", info)
+                << "TLS async_shutdown ec:" << ec.message();
+            state = complete;
+            self.complete(ec);
         }
     };
 };
diff --git a/include/async_mqtt/util/impl/stream_read_packet.hpp b/include/async_mqtt/util/impl/stream_read_packet.hpp
index 865cff310..7950e63a9 100644
--- a/include/async_mqtt/util/impl/stream_read_packet.hpp
+++ b/include/async_mqtt/util/impl/stream_read_packet.hpp
@@ -47,6 +47,7 @@ struct stream_impl<NextLayer>::stream_read_packet_op {
             a_strm.read_queue_.post(
                 force_move(self)
             );
+            a_strm.read_queue_.try_execute();
         } break;
         case work: {
             a_strm.read_queue_.start_work();
diff --git a/include/async_mqtt/util/impl/stream_write_packet.hpp b/include/async_mqtt/util/impl/stream_write_packet.hpp
index 66fe29d07..70f0ed207 100644
--- a/include/async_mqtt/util/impl/stream_write_packet.hpp
+++ b/include/async_mqtt/util/impl/stream_write_packet.hpp
@@ -51,6 +51,7 @@ struct stream_impl<NextLayer>::stream_write_packet_op {
             a_strm.write_queue_.post(
                 force_move(self)
             );
+            a_strm.write_queue_.try_execute();
         } break;
         case write: {
             a_strm.write_queue_.start_work();
diff --git a/include/async_mqtt/util/ioc_queue.hpp b/include/async_mqtt/util/ioc_queue.hpp
index 0684eb729..5632fbbe9 100644
--- a/include/async_mqtt/util/ioc_queue.hpp
+++ b/include/async_mqtt/util/ioc_queue.hpp
@@ -40,6 +40,9 @@ class ioc_queue {
             queue_,
             std::forward<CompletionToken>(token)
         );
+    }
+
+    void try_execute() {
         if (immediate_executable()) {
             queue_.restart();
             queue_.poll_one();