@PohGin Hello, 

Here are some suggestions you could try if energy monitoring does not work properly: 

Your current firmware looks a bit old, please Kasa APP and plug firmware are both up to date first. 

1. factory reset plug : with plug powered on, press ' settings' (looks like a gear) for more than 5 secs ( skip this step if you have tried factory reset )
2. try a different wall socket
3. confirm  plug's firmware is  up to date  (kasa app -> settings-> firmware update) and also Kasa app is up to date 
If still the same problem, please check my private message and  install a debug tool and help collect the log of the smart plug , thank you. 

May I also have a photo of the power consumption page, what home appliance has plugged in to this plug? 
 

@Solla-topee 

1. factory reset plug : with plug powered on, press ' settings' (looks like a gear) for more than 5 secs ( skip this step if you have tried factory reset ) - DONE, however problem still persist.
2. try a different wall socket - DONE, however problem still persist.
3. confirm  plug's firmware is  up to date  (kasa app -> settings-> firmware update) and also Kasa app is up to date - DONE, however problem still persist.
If still the same problem, please check my private message and  install a debug tool and help collect the log of the smart plug , thank you. - i did see your message, can you resend again?

May I also have a photo of the power consumption page, what home appliance has plugged in to this plug? - 1HP Air Conditiner

@PohGin Hello,

Thanks so much for sharing all the detailed info, I sent you the debug tool via email with forum ID 274200

To address the issue and try to fix it, we would like to have a specialist look into this further via email. Please check your mailbox later, and let us know if the issue is resolved. Thank you!