I got the same problem but just for Android. It shows the browser location bar but doesn't load the page.
What version of the in app browser plugin are you using? Are you using PG CLI or PhoneGap Build?
Sorry, my fault, resolved the problem. Thought I was using this plugin but I didn't.
I am using latest version of inAppBrowser and I am using online PhoneGap Build
Was this ever resolved? We are experiencing the same issue with IOS. The app loads and works great on Android. On iOS the app loads, splash screen shows and then it fades to white and nothing ever happens.
We are using the latest plugin and using PG Build