You tend to get this if there is a problem reaching the network, does the echo have a good signal ?
The Alexa node is only passing the messages it received from Amazon, so there is nothing much you can do about that with the node.
What is the command you are sending, I have noticed that with some commands, eg increase temperature, you will also see additional messages requesting other related parameters.
Presumably this is to update the current state in Alexa apps etc.
I've tested both cases and nothing has changed. It is important to say that through the Amazon Alexa application, clicking on the device, the problem does not appear and only when the command is by voice.