One thing I've found is that network traffic seems to hinder my devices from time to time, all of them (Alexa, Hue, WEMO) are on 2.4 GHZ and that is always jammed up at my house because all of my neighbors are on it. For example I'll tell Alexa or Siri to turn on the lights and it will respond and send the trigger that it successfully completed the task, however it won't happen from time to time, same when you manually trigger from the iPhone app, it acts like it worked but didn't. Hopefully we'll get more devices on 5.0 GHZ to alleviate this in the future.