Battery usage tool problems after january security update?

I've been using my nexus 6p for 5 days now. Everything worked fine until yesterday. BATTERY USAGE TOOL stopped showing apps battery consumption. It only shows SCREEN and SYSTEM usage.
It seems like battery performance took a hit and i don't know why... only thing i can think of is the January security update i received yesterday.
Tried deleting cache, didn't help.
Did a Factory settings reset, didn't help.
Seems like a software issue.
Anyone else encountered this problem and maybe have a fix?


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