@enezsun 

This kind of phenomenon is usually caused by a device setting. Here are a few things you can check to see if your plug has any of these configured:

1. Schedule. Set Up Schedule, Away Mode, and Timer for TP-Link Tapo Smart Plug/Bulb/Switch in Tapo App
2. Tapo Automations. *Please check all your automation rules. See if any are triggered on a timer and include an action to turn this specific plug on. Tapo Smart Actions: How to Set Up Automations and Shortcuts on the Tapo App
3. Third-Party Platforms: If your device is linked to platforms like Alexa or Google Home, also check their settings for any schedules or routines that might be controlling the plug.

If you find no current settings that could be causing this, a factory reset of the plug is a good next step. After resetting and reconfiguring it, give it a brand-new name you’ve never used before, and monitor it for a few days to see if the issue reappears. How to factory reset the Tapo/Kasa smart plug