Recently (last two firmware revisions, maybe three) We've found Alexa will successfully operate a device/dimmer, however after successfully turning the light on, she will report a lack of response from the device.
This has happened with several different devices.
I will open the Alexa app, remove the device not responding close the app, reopen and readd the device. Alexa will now receive responses.
The only related log I can find is:
Is this a known issue? I guess I could have set it up wrong but its pretty cut and dry.