@Solla-topee After deleting from the Alexa app and then discovering them again, plugs are now working through Alexa. It was not necessary to disable the Kasa skill (I was reluctant to do that because...

@Solla-topee Thanks for responding. Some of my HS105 have recovered by themselves, but there is one HS105 that still has a symptom. I will message you the MAC address. I have a (public) question for...

@planetbob99 Glad to know that I'm not alone. Hope that the fix comes soon!

An update from @RH99 I found there is one working HS105 in my home. The difference is the working one is with firmware 1.5.6, whereas the malfunctioning ones have 1.5.8 (V1) or 1.0.8 (V2). So, I...

@planetbob99 I also have exactly the same problem. I have more than 10 HS105 plugs, and Kasa Smart switches (HS200,HS210, HS220). I linked the Kasa app with the Alexa app, and everything used to work...