Hi,
I have no direct idea of why this occurs in our webview but it may be related to CSS.
Webkit is the base of android and IOS CSS rendering.
As far as I know the app uses the native browser on your device. If your native browser does not support (all) webkit functions it may go haywire.
Android has different versions on the market with each their own native browser and can sometimes be a headache.
Crosswalk is a (chromium) browser to package with your app to avoid native browser issues.
http://ionicframework.com/docs/cli/browsers.html
I always debug directly on my device and have no issues.
Good luck and happy hacking!