Hello   @Cool_guy230 

Device turning off itself could have something to do with APP settings & being affected by third party APPs, here are the useful tips that you should give it try: 

- Remove all app settings Schedule/ Timer/ Smart Action/  Away Mode settings on kasa device  

How to setup schedule, away mode and timer of TP-Link Smart Plug/Switch in Kasa APP?

-  if you use other software/ apps to control a smart device besides Kasa APP, please unlink thid party app temporarily and see if that helps. 

- check if plug will reboot in factory default state (note: do not set up with home Wi-Fi network first after factory reset when test this)

Factory reset the Kasa device by pressing the Reset button for 10 secs, keep it in the factory default state and observe whether it will do the same (bypass this if you've tried)

- check if Guest Wi-Fi on router helps:

Create a Guest Wi-Fi network on the router, and connect the smart device to guest Wi-Fi and see if that help resolve the issue?