[IOS7.1] Keyboard plugin shinkView with or without disableScrollingInShrinkView scroll the main view and remove my header on IOS 7.0 its OK

In my webview, i have a top fixed header and one scrollable div with the form. When i focus a field with

Keyboard.hideFormAccessoryBar(true);
Keyboard.shrinkView(true);
Keyboard.disableScrollingInShrinkView(true);

in ios7.0 my header is still visible. In io7.1 my header is scrolled out.

I think its also related to my second problem, when the webview is closed if i have an element in bottom:0 it was displayed out of the frame. Seems the webView size increase each time i open the keyboard