I have an iPhone 4s running iOS 7. I've noticed a pattern regarding apps "reloading" or starting back up from where they were after switching to another app and back. On previous versions of IOS, I noticed that apps would sometimes reload after window switching, but it seemed to me to be somewhat random, and somewhat based upon which app I was originally running. For example, if I was playing Angry Birds, I knew that it would take the phone powering off or a really long time even switching between apps before it would have to reload; however with Scrabble - it seemed like I could answer a text message and the app would restart and ask me to log back in.
With iOS 7, this behavior seems different and completely predictable. No matter what app I am using, if I switch to mobile Safari, that app will need to reload - even if only 2 seconds have passed, but I can switch to any other app, or do anything else short of powering off the phone, and the app I returned to would start where I left off. Switching to Safari forces any other app to reload when switching-every time.
Can anyone confirm this? Is it a function of something I can control? What is it a function of?