APP stuck on splash screen when using --prod (IOS 10 or lower ONLY)


The app works fine in both android and ios (11.3 or hight), when I used to run the app using commands:
ionic cordova build ios
But as soon as I run the app using ‘–prod’ in front of them the app used to get stuck on my splash
My ionic info prints this:

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.19.2
    ionic (Ionic CLI) : 3.20.0

global packages:

    cordova (Cordova CLI) : 8.0.0 

local packages:

    @ionic/app-scripts : 3.1.8
    Cordova Platforms  : ios 4.5.4
    Ionic Framework    : ionic-angular 3.9.2


    ios-deploy : 1.9.2 
    ios-sim    : 6.1.2 
    Node       : v8.10.0
    npm        : 5.6.0 
    OS         : macOS High Sierra
    Xcode      : Xcode 9.3 Build version 9E145 

Environment Variables:

    ANDROID_HOME : not set


    backend : pro

I got this in my safari debugger. Maybe this would help you out…!
I run on IOS 11.3 no problem, but with IOS 10 or lower and using flag “–prod” then error.