I had the problem since the first day I upgraded to Nougat.
I tried to keep the screen uncovered by the folio case, seems that everything is fine. thanks bro!
and when I just convered the screen with folio case. the battery started to drain.
I checked the battery usage, when the screen uncovered, the "android system" normally has 5-6% usage when battery has 25% or so left.
when the folio covered the screen. the "android system" has 5% usage when battery has 85% left and the phone became hot.
and i found that "LG Backup" (in the app list of "android sysmtem") is the criminal, when the battery drains fast, the usage of "LG Backup" also goes up to more than 10%.
what is the relation between folio case cover and "LG Backup" App? WTF.
If someone has the same problem and noticed that "android system" takes up to more than 10% and has a orginal folio case. Please try to test with or without the folio case.