One thing I've noticed is that Facebook is running in the background again. I have Background services off and Facebook is not allowed to access Camera or microphone yet in iOS 12 it's reporting significant background time. According to the Battery Stats in the last 8 days it's showing 2h42m background
. They pulled this crap before. I left it running just to see what stats it would show.
And please no "I deleted Facebook years ago" responses. I use it to stay in touch with Friends that I have around the world.