I am noticing the same thing here. I use the "Smart actions" timer to turn off some lights after 15 minutes. They were working fine up until a few days ago, now none of the 3 that I had set up work. :(

@flipflop49 same here, tech support tried to tell me that the function of a switch (hs200) controlling a switch (hs220) was no longer supported. I explained that a switch (hs200) controlling an outlet (hs103) didn't work either anymore. That confused them and they tried to get me in a circle of questions. Got escalated to a call back, told them I wouldn't hold my breath.
 

Elsewhere on here tech support said it was a cloud issue a week ago. 

I just have straight switches (hs-200 and hs-220) that control lights and it isn't working for them. Also have some plugs (hs-105 and hs-103) on some things the also quit "Auto shut off". NONE of these are working with programmed "Smart Action" Auto off functions as they were up until a few days ago. I cannot understand why on earth they would just suddenly no longer support "Smart Actions" like auto shut off. My impression is that the "Smart Action" capability was only introduced earlier this year - I could be wrong about that though. What is going on with these folks?????

@JDTV 

late monday night all the switches smart actions came back on line.   This has to be a tp link kasa server issue.  I did nothing other than wait.

evidently they don't have a reliable server.

jim

@JDTV  Yep. Just checked mine and the "Auto off" smart action is working again. Apparently one wrong keystroke up there at TP-Link and these things start getting stupid. That's not very reassuring! 

Well here we go again, it's Friday and Auto Off Smart Action isn't working again.

@flipflop49 

Been emailing back and forth with tp  link support , they finally confirmed it's an issue on their end- takes a tech there to "restart" the app / server on their end.  
Don't know why it always takes more than a day for them to notice their own system is down?  
glad they aren't running a bank or hospital!!!!

You would think that a large mainstream company like TP-Link could keep their servers and software working correctly and properly support their customers.

I guess that they must be using TP-Link hardware and calling their own Tech Support for help maintaining it correctly. I wonder if they are rude and hang up on themselves?