Android OS battery drain issue

I have G850F with nordic 5.0.2 firmware. I reinstalled via Odin, then factory reseted, then again reinstalled, again fr. It's keep wakelocking very much. The unit "Android OS" and "Android System" are the main battery drainers, but I have no idea why. On many forums this is a common problem. From 6AM to 2PM Android OS wakelocked 40 minutes. It was mobile data on, and location off. On wifi, the problem still persists, in the night, it losts 3-4% or more. Location on or off doesn't make a difference. On my previous phones this (Or similar) problem wasn't exist (Mi3W) or it have been fixed (Xperia SP).
How can I fix this? What I tried: deleted old, not updated apps, cleaned nano sim, factory reseted, wiped cache, disabled UnifiedDaemon, disabled Location and Location Reporting, disabled Samsung Find my Phone, set it to WCDMA/GSM instead of 4G/WCDMA/GSM.
Screenshots are coming.