Pubg lagging too much

Usually I play games at night and after full day of use, the charge gets depleted and I have to play game while charging. I'm experiencing huge frame drop to 22-23fps and the temperature shows around 40-41°C. Me ambient temperature is 24°C. @Anders_ASUS please do something.
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I've attached the screenshot, to give a feel, the full video can be found here.
I'm not saying this happens because the charger is connected. I hope @Anders_ASUS gives a quick solution.
My armoury crate settings.
After the latest update , I've turned of Xmode completely also my temp is always set to normal , CPU 2.96 and everything works perfectly whereas earlier even after putting everything on hardcore still game use to struggle but it's working just as it was when I bought this beast . Tip: avoid gaming while your charger is plugged in , be it any smartphone it will face lags for sure also will degrade your battery performance . Thankyou
I think this is not with the ROG, its actually with PUBG a friend of mine is using Oneplus he is alsofacing frame drops and heating issue.
Well this is probably due to a number of reasons. Low battery, high temp and charging. The device is trying to keep performance low to extend battery life, you said it's charging so this shouldn't be an issue but because of the high temp, it might not charge fast enough to compensate for the power draw from the game. So all in all. This is the result of a bad combination. Next time, leave your phone on the table charging for 15 minutes and then you can play. It's recommended however to lower your settings if you're charging at the same time to keep the overall heat down.
I also used to get the same fps in close range later I found a trick in youtube i.e if you are logging to game via facebook then go to add accounts in the settings.Then link your google play account after linking logout your pubg account .Then login via playgames not through facebook .
After doing the above steps I didn't even turn on X mode ,now I am getting constant 58 to 60 FPS(anti aliasing off).
please try these steps and tell me ur performance review .