I tested both on the iOS simulator in xcode and on a physical iPhone 6 and both are showing an extra white space at the bottom of the page when the keyboard is open. I extends past the body and html elements but they background color still fills it. The problem has not appeared on Android.
This is my app with the white space highlighted. It disappears after the keyboard is closed. The popup is absolutely positioned. I've tried setting the overflow in CSS without success.
I've noticed the same bug on bing.com when you click on an input field and scroll to the bottom. Any suggestions?

