UPDATE: The issue seems to stem from having many select elements on a page. How random is that?
So here\'s the issue. On iOS 7 Safari, when tapping
It happens not only in iOS but in safari 7 for MAC OS (Maverics) too, I have found that the problem happens when you use a lot of div tags to contain inputs (or selects) within a form:
...
I changed the layout of my selects to use ul/li and fieldsets instead of divs and the freezze time was reduced drastically.
Here are two examples in jsfiddle:
freezze for 5 seconds
http://jsfiddle.net/k3j5v/5/
freeze for 1 second
http://jsfiddle.net/k3j5v/6/
I hope it might help someone