@Merandy I too have exactly the same problem. I live in NZ. It is completely random and happens far too often. It got me so frustrated I nearly returned all of it. I am writing now because it has just done it all again. I just want it fixed. It is no where near reliable enough yet. I have discovered however over time that if I just leave it for a day or so it seems to come right again and my commands suddenly work. Please Kasa get together with Amazon and sort this out.

I'm having an issue with only one of my TP-Link plugs after it's worked for a couple years just fine. Now Alexa says OK when I tell her to turn it on, but nothing happens. I can turn it on through the Alexa app by tapping the on/off button, and Alexa will turn it off when I tell her to just fine. I also have a routine set up that turns this plug, along with certain others off, when I say say it's bedtime and that feature also works just fine, but it just won't turn ON using voice through Alexa. I'm afraid to disconnect it completely due to others saying they weren't able to reconnect.

@CuteSmurf I had this issue and fixed it by Disabling the Kasa skill in the Alexa app and then reenabling it. Hope this helps someone!

@ridemooses OMG, thank you! My Echo Dot stopped interfacing with my Kasa plug a couple weeks ago and I've been trying for days to fix it with no luck. I just disabled the Kasa skill and re-enabled and it WORKS!!! Thank you so much for posting the tip....you saved me hours of time and a world of headache!