Lots of timeout exceptions while attaching to Workflow Manager ServiceHost

When I attach to WFM ServiceHost with 'break on exception' I constantly get 

System.ServiceModel.FaultException`1 occurred
  HResult=-2146233087
  Message=The operation has timed out.
  Source=Microsoft.ServiceBus
  Action=http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher/fault
  StackTrace:
    Server stack trace: 
       at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.ThrowIfFaultMessage(Message wcfMessage)
       at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.HandleMessageReceived(IAsyncResult result)
    Exception rethrown at [0]: 
       at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
       at Microsoft.ServiceBus.Messaging.Sbmp.DuplexRequestBindingElement.DuplexRequestSessionChannel.DuplexCorrelationAsyncResult.End(IAsyncResult result)
       at Microsoft.ServiceBus.Messaging.Channels.ReconnectBindingElement.ReconnectChannelFactory`1.RequestSessionChannel.RequestAsyncResult.<GetAsyncSteps>b__4(RequestAsyncResult thisPtr, IAsyncResult r)
       at Microsoft.ServiceBus.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult result)
    Exception rethrown at [1]: 
       at Microsoft.ServiceBus.Common.AsyncResult.End[TAsyncResult](IAsyncResult result)
  InnerException: 

Also every time I publish an activity or workflow through WorkflowManager.Client I get this exception (though publish seems to work). No messages in Event log or any further details...

System.Net.InternalException occurred
  HResult=-2146233087
  Message=System error.
  Source=System
  StackTrace:
       at System.Net.HttpWebRequest.GetWritingContext()
  InnerException: 

Workflows seem to run fine. Should I worry about these exceptions?

Regards