Ionic splash freezes occasionally on 4g/data

On start up my splash screen will freeze round 1/10 times on start up. After updating I’ve the number of incidents has increased, anyone encountered this or have any thoughts?

Ionic:

ionic (Ionic CLI) : 4.5.0 (C:\AppData\Roaming\npm\node_modules\ionic)
Ionic Framework : ionic-angular 3.9.2
@ionic/app-scripts : 3.1.10

Cordova:

cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
Cordova Platforms : android 6.3.0, ios 4.5.5
Cordova Plugins : not available

System:

Android SDK Tools : 26.1.1 (C:\AppData\Local\Android\Sdk)
NodeJS : v8.11.3 (C:\Program Files\nodejs\node.exe)
npm : 6.4.1
OS : Windows 10

Plugins:
“com.xmartlabs.cordova.market”: “^1.2.0”,
“cordova-android”: “6.3.0”,
“cordova-ios”: “4.5.5”,
“cordova-launch-review”: “^3.1.1”,
“cordova-plugin-app-version”: “^0.1.9”,
“cordova-plugin-appavailability”: “^0.4.2”,
“cordova-plugin-cookieemperor”: “^1.0.0”,
“cordova-plugin-crypt-file”: “^1.3.3”,
“cordova-plugin-datepicker”: “^0.9.3”,
“cordova-plugin-device”: “^2.0.2”,
“cordova-plugin-dialogs”: “^2.0.1”,
“cordova-plugin-email-composer”: “^0.8.15”,
“cordova-plugin-fcm”: “^2.1.2”,
“cordova-plugin-file”: “^6.0.1”,
“cordova-plugin-google-analytics”: “^1.8.6”,
“cordova-plugin-googlemaps”: “^2.4.6”,
“cordova-plugin-inappbrowser”: “^3.0.0”,
“cordova-plugin-market”: “^1.2.0”,
“cordova-plugin-network-information”: “^2.0.1”,
“cordova-plugin-splashscreen”: “^5.0.2”,
“cordova-plugin-statusbar”: “^2.4.2”,
“cordova-plugin-whitelist”: “^1.3.3”,
“cordova-plugin-x-socialsharing”: “^5.4.1”,
“es6-promise-plugin”: “^4.1.1”,
“ionic-angular”: “3.9.2”,
“ionic-plugin-keyboard”: “^2.2.1”,

Was readAsText from ionic File readAsText never resolving so put polyfills.js behind cordova.js in index.js and workded File.readAsText never resolves