Battery draining so fast On ROG phone 5

[yuszblizz]

Please tell us some basic information before asking for help:
Model Name: Asus ROG Phone 5
Firmware Version: 31.0810. 1226.91
Rooted or not: not
Frequency of Occurrence: alwasy
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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After updating my rog phone 5 to A12, I am having problem with the battery draining fast even in idling mode, where I turned off the 4g/wifi and left the phone overnight when iam sleeping. After I woke up in the morning, the battery will decreased like almost 8% to 10%. The battery will even drained faster when iam playing games. I realized the the android OS, Android system consume so much power from the battery compared to A11 before. How to fix this issue? Please help. This screenshot after I restarted my phone few hours ago..

[ErikWang]

FYI, i done a factory reset and it ghost drain during idle seems to be gone.

[Mattias_ASUS]

Oh!
Good to know you managed to solve it! :D!

[yuszblizz]

I see.. Then after you done the factory reset, did you update your ROG5 to A12 or u stick with A11?

[ASUS_Bot]

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