Just an FYI for anyone having issues with ST and Alexa, Just recently for some reason about 31 devices were reporting offline/unresponsive in my Alexa app. All my Echo devices wouldn't control them telling me that they were not responding. I tried to delete them in the Alexa app and rediscover and that didn't work. I tried a few other things without success. It wasn't until I deleted the Alexa app on my phone and then flushed the cache on the phone and reinstalled the Alexa app that EVERYTHING was able to be discovered and I was able to move on with business.