主屏幕上的iPhone网络应用程序总是重新加载应用程序之间的切换

I'm working on a mobile web app (website) that requires you to add it to the home screen. When you open it, and switch to another app, then go back to my web app, the whole app reloads. It shows the splash screen and doesn't even remember where you last were.I'm working on a mobile web app (website) that