jQuery UI Slider scrolling to bottom if bound through an iFrame on iPhone devices

jQuery UI Slider scrolling to bottom if bound through an iFrame on iPhone devices

Strange behaviour inside iframes and jquery ui slider:


In the example there are 4 sliders inside a div, and 4 inside an iFrame. If I use the last slider inside the iFrame on iPhones it scrolls the iFrame to the bottom. Any explanation for this behaviour?