Hey. Recently I got an iPhone X and it shipped with 12.1.2. Coming from an iOS 11 device, the screen on usage time is very different. From what I can tell, it’s meant to reset itself everyday? So today at 8am, it said my screen on usage time was 6 hours. Then I charged up my device and it went down to 5 hours then 4 and at the moment, I am getting a usage time of under 4 hours but I haven’t been using it that long since the last charge? Is this a glitch or something? Help me to understand it. I thought your iPhone was meant to reset the screen on time after each full charge? This hasn’t seem to do that... I am confused.