So I decided to play Pokémon go again today while I was walking around town. I hadn't really played it on the iPhone 7 yet, but I never had this problem on my 6S. On my 6S if I closed the app and reopened it, it was still loaded, even if I hadn't opened it in quite some time. With the iPhone 7 almost every single time I reopened the app it would have to reload, even after just a moment or two to take a pic or send a message. I would see the splash screen while it loaded. Has anyone noticed this with the iPhone 7?