Why/when do I have to tap twice to trigger click on iOS

Question

Ok I feel like I\'m crazy...

I\'m looking at Mobile Safari on iOs 6.0. I can\'t seem to establish any rhyme or reason as to when tapping on an element will trigger

Answer 1

iOS will trigger the hover event if an element is "display: none;" in the normal state and "display: block;" or inline-block on :hover.