Can someone please explain what is the purpose of this Screen On / Screen Off info in the Battery section? It totally doesn't make any sense. In previous iOSes it nicely told you the USAGE & STANDBY where 'usage' was the actual time you were using your phone, while 'standby' was the accumulation of both active usage + screen off/sleeping while not being charged. But with iOS 12 this Screen On / Screen Off doesn't tell me anything. I took my phone off the charger about 7 hrs ago and it was in standby mode (locked) for the better part of this time, but I did use it for like 20-30 mins actively today. However, it currently says Screen On 4h 58 m and Screen Off 15m. And what exactly is this supposed to tell me?? Totally useless.