Same thing happens to my HS110 Ver 4.0 with firmware 1.0.5 for many months.

Every few days (i think its always evening) it turns off and immediatelly turns on. 

It has happened twice this week. I have a TV set and a few other devices on it and I am afraid that its going to harm the devices.

I have 3 HS110 Ver 4.0 in total but only the one in the living room is doing this (I am sure that if the one in the bedroom was doing this I would know because my wife uses this one and we all know what that means in case of a failure!...)

I would say its the furthest from the router (in case that is a problem) but its not actually that far (10 meters with one wall between them) and the router is a pretty solid one (fritzbox 7530) with great signal (even the plug is reporting a -55db signal), so i dont think thats an excuse.'

The maximum load is around 600-700watt (no spikes or heavey load).

So many hs110 users with that problem for so many months and TP-Link states that there is no known issue... 

V4, issue has always been there (year, maybe years) and never been addressed. So close to throwing these away.

Just_a_user wrote

@Edwardon 

 

Yes it definitely seems to be a cloud problem. I also have a bunch of smart plugs that turn off and on at random, but always simultaneously.

 

If it were a hardware problem it should happen independently for each switch.

 

I was in doubt whether it was a TP-Link problem or a Google integration problem, but it looks like it's all on TP-Link given the posts from others.

 

 

  @Just_a_user  I would have to agree.  I have another smart switch along side the TP-Link device and it has no problems. If you can't depend on this system, it's not much use.

  @chengfatt I had the same problem too where one of my smart lights would turn on and off randomly (almost hourly!) and then I would be unable to control it in the app for a while to switch it back on/off.
Do you by chance have it set up with an Alexa device? A couple of days ago I was setting up an Amazon household as someone else in my family bought an Echo dot. In doing so, I was kind of annoyed that almost everything in my Alexa app reset - meaning I had to re-input my preferred music service, routines etc... This also meant that the TP-Link Kasa skill also reset itself meaning I hade to end able it again which I hadn't done since I purchased my Echo dot almost 2 years ago. I don't know if it was because the skill was updated or what but since doing that the bulb hasn't turned off on its own. So yeah, you might want to try unenabling and then re-enabling the TP-Link Kasa skill if you own an Alexa device.