Native App Refresh

Just a question but I have noticed since the day I started building my App that when you have it saved as a Shortcut on your phones Home Screen, it always has to load the page again when you swap between other apps. Not a big issue but I just wondered if there was any tricks to stop it from doing that? Or is this just the nature of it?

It’s like it doesn’t keep anything in memory, maybe that’s just the way it works, does it do this when you wrap it all up in goNative or phoneGap does anyone know? After all, it’s just a webpage right?