I just set up Hubitat yesterday and am pretty happy so far. One issue I was having was that Alexa would turn on a device and then follow with "that device is not responding". I tried a few things to fix it and nothing worked.
Then I found my error. In my confusion I had added the Alexa skill within Hubitat and then went to the Alexa app and added the Hubitat skill in there as well. I did not realize that if you add the Hubitat skill in the Alexa app and linked to your Hubitat account, that it then adds the Alexa skill in Hubitat for you. So basically I was doubling things.
Hopefully this helps some other new guy. 
