Android app stuck on white screen after reload

Hello all, I am trying an Ionic 4 app with "cordova-plugin-ionic-webview": "4.0.0", and I am facing the blank white screen issue on Android Platform only.

Now the scenario is,
The app starts and we make a loadUrl call to CordovaActivity with this parameter `file:///android_asset/www/index.html`
This works fine.

But then, we download some web resources and put into path `/data/user/0/io.ionic.starter/no_backup/www/`
Next, we reload the app and try to load the new file with URL `file:///data/user/0/io.ionic.starter/no_backup/www/index.html`

Here is when we hit the blank white screen. Any help is appreciated.
I have verified that the file actually exists at the expected path.

Thanks.

ionic-info:
```
Ionic:

ionic (Ionic CLI) : 4.10.3 (/Users/yashsoni/.npm-global/lib/node_modules/ionic)
Ionic Framework : @ionic/angular 4.0.1
@angular-devkit/build-angular : 0.12.4
@angular-devkit/schematics : 7.2.4
@angular/cli : 7.2.4
@ionic/angular-toolkit : 1.4.0

Cordova:

cordova (Cordova CLI) : 8.1.2 (cordova-lib@8.1.1)
Cordova Platforms : android 7.1.4
Cordova Plugins : cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.0.0, (and 7 other plugins)

System:

Android SDK Tools : 26.1.1 (/Users/yashsoni/Library/Android/sdk)
ios-deploy : 1.9.4
NodeJS : v8.11.1 (/usr/local/bin/node)
npm : 6.6.0
OS : macOS Mojave
Xcode : Xcode 10.1 Build version 10B61
```

cordova plugin ls:
```
cordova-plugin-device 2.0.2 "Device"
cordova-plugin-dialogs 2.0.1 "Notification"
cordova-plugin-globalization 1.11.0 "Globalization"
cordova-plugin-ionic-keyboard 2.1.3 "cordova-plugin-ionic-keyboard"
cordova-plugin-ionic-webview 4.0.0 "cordova-plugin-ionic-webview"
cordova-plugin-okhttp 2.0.0 "OkHttp"
cordova-plugin-splashscreen 5.0.2 "Splashscreen"
cordova-plugin-statusbar 2.4.2 "StatusBar"
cordova-plugin-whitelist 1.3.3 "Whitelist"
```