Took an iPhone in to the Apple store because the screen went black and couldn't get it to DFU restore. (It has a broken power button and turns out there was lint in the lighting plug so it wouldn't restart on plug in). They said the reason the phone shut down was because it ran out of memory with too many apps open and it caused the system to freeze. They suggested double tapping then swiping up all the apps to kill them. Why do they recommend this when it goes against the way Apple describes how multitasking works? It manages background apps memory automatically. Now my whole family spends time manually closing their apps like it's a computer.