jQuery fixed header

jQuery fixed header

Did jQuery Mobile already fixed the iOS "bug" of the fixed header? When working on Android (in combination with Phonegap by the way) the fixed header stays fixed when focusing on an input field, but when doing this on iOS the header starts scrolling. Is this a jQuery Mobile flaw or an iOS feature?

I have found numerous ways of hiding the header onfocus, but I would simply like the header to stay at the top of the page/app. Can this be done?