Can't set Ionic ios AutoHideSplashScreen to false?

I am using Ionic's new CLI to build my splash screen and Icon. http://ionicframework.com/docs/cli/icon-splashscreen.html

However in ios my splash screen disappears way too fast. In my config.xml I have:

  <preference name="AutoHideSplashScreen" value="false" />
  <preference name="SplashScreen" value="screen"/>
  <preference name="SplashScreenDelay" value="5000"/>

but every time I build the project it resets my AutoHideSplashScreen value to true in my platforms/ios/myApp/config.xml I wan't to have control over how long my splash screen shows in ios. Is there a way I can set the AutoHideSplashScreen and it won't change when I build my app?