MQTTnet: MQTT communication exception while receiving packets

I use the MQTTnet client to connect to aws iot through a presigned url, it works, however, every about 100 seconds (it is pretty accurate every time) it will get disconnected. i am not sure why. here is the log i got:

>> [2018-01-19T15:59:07.0172770-05:00] [10] [MqttClient] [Verbose]: Trying to connect with server.
>> [2018-01-19T15:59:07.0202781-05:00] [10] [MqttChannelAdapter] [Verbose]: Connecting [Timeout=00:00:30]
>> [2018-01-19T15:59:07.1783819-05:00] [11] [MqttClient] [Verbose]: Connection with server established.
>> [2018-01-19T15:59:07.1853863-05:00] [7] [MqttClient] [Info]: Start receiving packets.
>> [2018-01-19T15:59:07.3435203-05:00] [5] [MqttChannelAdapter] [Verbose]: TX >>> Connect: [ClientId=360d99a6fe41b3c1c6a095993b7ae9b6d2ca979c9b9cc690de1d03a7fe2f8e51] [Username=] [Password=] [KeepAlivePeriod=10] [CleanSession=True] [Timeout=00:00:30]
>> [2018-01-19T15:59:07.4546491-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< ConnAck: [ConnectReturnCode=ConnectionAccepted] [IsSessionPresent=False]
>> [2018-01-19T15:59:07.4696600-05:00] [5] [MqttClient] [Info]: Received <<< ConnAck: [ConnectReturnCode=ConnectionAccepted] [IsSessionPresent=False]
>> [2018-01-19T15:59:07.4726629-05:00] [5] [MqttClient] [Verbose]: MQTT connection with server established.
>> [2018-01-19T15:59:07.4886676-05:00] [9] [MqttClient] [Info]: Start sending keep alive packets.
>> [2018-01-19T15:59:07.4896734-05:00] [9] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T15:59:07.4966735-05:00] [5] [MqttChannelAdapter] [Verbose]: TX >>> Subscribe: [PacketIdentifier=1] [TopicFilters=57e581b25854ac000ff6f3ef@AtLeastOnce,59272c7e80e5cf82a30d39fb@AtLeastOnce,57fcd4575730e4000f9ba85f@AtLeastOnce] [Timeout=00:00:30]
>> [2018-01-19T15:59:07.5086791-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T15:59:07.5096801-05:00] [9] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T15:59:07.5527116-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< SubAck: [PacketIdentifier=1] [SubscribeReturnCodes=SuccessMaximumQoS1,SuccessMaximumQoS1,SuccessMaximumQoS1]
>> [2018-01-19T15:59:07.5527116-05:00] [12] [MqttClient] [Info]: Received <<< SubAck: [PacketIdentifier=1] [SubscribeReturnCodes=SuccessMaximumQoS1,SuccessMaximumQoS1,SuccessMaximumQoS1]
>> [2018-01-19T15:59:17.5244169-05:00] [5] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T15:59:17.5444309-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T15:59:17.5454313-05:00] [5] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T15:59:27.5646272-05:00] [5] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T15:59:27.5836342-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T15:59:27.5836342-05:00] [5] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T15:59:37.5868786-05:00] [9] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T15:59:37.6078826-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T15:59:37.6078826-05:00] [12] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T15:59:40.6239881-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< Publish: [Topic=57fcd4575730e4000f9ba85f] [Payload.Length=512] [QoSLevel=AtLeastOnce] [Dup=False] [Retain=False] [PacketIdentifier=1]
>> [2018-01-19T15:59:40.6239881-05:00] [9] [MqttClient] [Info]: Received <<< Publish: [Topic=57fcd4575730e4000f9ba85f] [Payload.Length=512] [QoSLevel=AtLeastOnce] [Dup=False] [Retain=False] [PacketIdentifier=1]
>> [2018-01-19T15:59:40.9493656-05:00] [9] [MqttChannelAdapter] [Verbose]: TX >>> PubAck [Timeout=00:00:30]
>> [2018-01-19T15:59:47.6221570-05:00] [9] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T15:59:47.6482058-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T15:59:47.6491995-05:00] [9] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T15:59:57.6662408-05:00] [9] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T15:59:57.6872503-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T15:59:57.6892564-05:00] [9] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T16:00:07.7111522-05:00] [9] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T16:00:07.7321702-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T16:00:07.7331669-05:00] [9] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T16:00:17.7528845-05:00] [12] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T16:00:17.7728972-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T16:00:17.7748992-05:00] [9] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T16:00:27.7791319-05:00] [9] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T16:00:27.8011393-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T16:00:27.8021397-05:00] [9] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T16:00:37.8198474-05:00] [12] [MqttChannelAdapter] [Verbose]: TX >>> PingReq [Timeout=00:00:30]
>> [2018-01-19T16:00:37.8388580-05:00] [7] [MqttChannelAdapter] [Verbose]: RX <<< PingResp
>> [2018-01-19T16:00:37.8388580-05:00] [11] [MqttClient] [Info]: Received <<< PingResp
>> [2018-01-19T16:00:47.4215941-05:00] [7] [MqttClient] [Warning]: MQTT communication exception while receiving packets.
MQTTnet.Exceptions.MqttCommunicationException: The remote party closed the WebSocket connection without completing the close handshake. ---> System.Net.WebSockets.WebSocketException: The remote party closed the WebSocket connection without completing the close handshake. ---> System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'SslStream'.
   at System.Net.Security.SslState.CheckThrow(Boolean authSuccessCheck, Boolean shutdownCheck)
   at System.Net.Security.SslState.get_SecureStream()
   at System.Net.TlsStream.EndRead(IAsyncResult asyncResult)
   at System.Net.PooledStream.EndRead(IAsyncResult asyncResult)
   at System.IO.Stream.<>c.<BeginEndReadAsync>b__43_1(Stream stream, IAsyncResult asyncResult)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncTrimPromise`1.Complete(TInstance thisRef, Func`3 endMethod, IAsyncResult asyncResult, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Net.WebSockets.WebSocketConnectionStream.<ReadAsync>d__21.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at System.Net.WebSockets.WebSocketBase.WebSocketOperation.<Process>d__19.MoveNext()
   --- End of inner exception stack trace ---
   at System.Net.WebSockets.WebSocketBase.WebSocketOperation.<Process>d__19.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Net.WebSockets.WebSocketBase.<ReceiveAsyncCore>d__45.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MQTTnet.Implementations.WebSocketStream.<FetchChunkAsync>d__23.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MQTTnet.Implementations.WebSocketStream.<ReadAsync>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MQTTnet.Implementations.WebSocketStream.Read(Byte[] buffer, Int32 offset, Int32 count)
   at System.IO.Stream.ReadByte()
   at MQTTnet.Serializer.MqttPacketReader.ReadHeaderFromSource(Stream stream, CancellationToken cancellationToken)
   at MQTTnet.Adapter.MqttChannelAdapter.<ReceiveAsync>d__13.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MQTTnet.Adapter.MqttChannelAdapter.<>c__DisplayClass12_0.<<ReceivePacketAsync>b__0>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MQTTnet.Adapter.MqttChannelAdapter.<ExecuteAndWrapExceptionAsync>d__14.MoveNext()
   --- End of inner exception stack trace ---
   at MQTTnet.Adapter.MqttChannelAdapter.<ExecuteAndWrapExceptionAsync>d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MQTTnet.Adapter.MqttChannelAdapter.<ReceivePacketAsync>d__12.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MQTTnet.Client.MqttClient.<ReceivePacketsAsync>d__40.MoveNext()
>> [2018-01-19T16:00:47.4676255-05:00] [7] [MqttClient] [Info]: Stopped sending keep alive packets.
>> [2018-01-19T16:00:47.4686240-05:00] [7] [MqttChannelAdapter] [Verbose]: Disconnecting [Timeout=00:00:30]
>> [2018-01-19T16:00:47.4716251-05:00] [7] [MqttClient] [Info]: Disconnected from adapter.
>> [2018-01-19T16:00:47.4716251-05:00] [7] [MqttClient] [Info]: Disconnected.
>> [2018-01-19T16:00:47.4776303-05:00] [7] [MqttClient] [Info]: Stopped receiving packets.

I am not sure if this is a issue with aws or not, but just can not find the cause.