The steps added for the ASP.Net Ajax controls RadInput and RadButton automatically scrolls the target element to top of the page. In the case when there is a static header on the page, the element gets scrolled under it and the actual action cannot be performed correctly. 

The workaround to use is to add the input or button element from the DOM tree and manually add a Click or Enter text step, enable 'SimulateRealClick' or 'SimulateRealTyping' and change the ScrollType property to scroll the element to the center of the page instead to top.