I have multiple Kasa HS220 dimmers and KS230 3pole Dimmers.  I can voice control them through Alexa, either using "Alexa Living Room Overheads On" or "Off" etc.  I normally also can issue a command such as "Alexa, Living Room Overheads 50 PER CENT," and they will dim to the requested value.  

On occasion when I make a per centage request, I get a message from Alexa "Living Room is not responding, please check its network connections and power supply."  However if I do a simple "ON" or "OFF" request for the same switch the switches respond as if nothing is wrong.  This problem is intermittent and seems to solve it self. Does anyone have similiar experiences, and what do you do to repair the connection?