Plus, there are two very tiny outputs on the top-left screen saying: "Kernel is not seandroid enforcing. Set warranty bit kernel".
Before the problem appeared, I fully restocked my LL720 to NAE, then used Odin to flash root, then installed GooManger, and TWRP, then installed a customized MIUI.
Does anyone have the same charging problem with me when phone is turned off? Is it a battery physcial issue or related to the ROM I flashed? Your help is appreciated. Thanks.