Alexa incorrectly believes that node red devices are "Not responding"

I am using node-red-contrib-amazon-echo to control devices on my network with my 3rd gen echos. I am able to control these devices using voice commands with Alexa, however, after every command (even successful ones) Alexa notifies me that “hmm, [device name] is not responding”. I’ve seen that this used to be a known issue, but can’t find any recent reports of anything similar.
TIA for any help, it is much appreciated.