@Robautomator I just posted this on Amazon under the question area.  Hopefully this will get tech supports attension.
HS300 Random power cycle: own 2 of these they both randomly power cycle - see others  ( https://community.tp-link.com/en/home/forum/topic/178634 )

@Robautomator 

thanks for sharing the feedback!

Do you use the Android or iPhone app to control it?

There was bug in the iOS app (2.25) which was to be fixed in the last update (2.26). That bug broke the scenes feature.
 

I have not updated it as i have moved to android app and since 09/13 i have not had any power cycle. I really think Android implementation of their app really good and iOS app trigger all kind of problems.
 

the support was in the beginning slow and generic but i got in touch with a very nice manager and he really listen to my feedback and thats how that bug was confirmed and hopefully fixed in 2.26 (yet to test it).

@NomanA I've been using the iOS app primarily, v2.25, and just began the update to 2.26 a few moments before one of the plugs cycled again.

I can see how the scenes bug might be connected to these restarts--but wondering why it would cycle randomly, instead of when a scene is run.

Will monitor for further shutdowns now that I'm on the latest version.

@Robautomator 

Thanks for sharing app versions. I think atleast based on my experience the iOS ver send some instructions randomly that it shouldn't and that causes these power cycles. Im on Android app and can't be more happy. I was almost going to submit an RMA but since moving to Android all of issues are gone. (Android app was also updated to 2.26 but im keeping mine at 2.25, just dont have the courage to deal with new problems lol)

Still getting power cycles after updating the iOS app to v2.26. Going to try uninstalling to see if that helps.

@NomanA Andriod OS Version 9
Kasa Power Strip:
Model HS300
Hardware Version 1.0
Firmware Version 1.0.19
I have 2 of these power strips and they both randomly power cycle all the plugs at once.  These 2 power strips are basically useless to plug anything important into them.

Btw, I have about 10 Kasa Power plugs HS110 which never reboot themselves.

@DjMartin2020 

thanks for sharing, I'm on android 10 but i think the apps are desgined to work on all Android OS versions (not sure if the app behave different between the AndroidOS versions),so My hypothesis that its an iOS issue could be wrong. Im on app ver. 2.25 on Android and did not experience power cycle again. It could also be a router incompatibility issue but i think i may have been just lucky since switching from ios to Android app.

Kasa support does not belive that its a widespread issue, atleast after all my efforts to convince them. I hope they RMA a defective unit and perform thorough testing to isolate this power cycle bug. Its a great device given it works all the time.

Uninstalling the iOS Kasa app seems to have had no effect--still getting random power cycles on both units, multiple times a day. Going to have to RMA, as it seems they have no interest in solving the issue.

The support team finally approved an RMA, but when I asked them about the details of sending a new unit before I send the old one back (since my setup is built around these units), the support staff neglected to mention that they charge $15 (each, presumably) to send the replacement units out first. Pretty terrible support experience, considering the cost of these units.