Loading bar appears in centre of screen on ipad when keyboard is open

[mikegc]

On iOS in safari, the loading bar can appear vertically centered on the page. I have found some other examples of this issue:
http://stackoverflow.com/questions/14492613/ios-ipad-fixed-position-breaks-when-keyboard-is-opened

I'm not sure what the best fix is, but looks like a combination of css/js (I'm only a css person).

Thanks.

[faceleg]

Could you please provide a JSFiddle or Plunkr that replicates the issue?