the fault lies in the positioning of the .find-box – the admin.js overides the css positioning and forces it to display off canvas. Simply remove: .css({top:r+30+”px”,left:”50%”,marginLeft:”-250px”}) from the admin.js script solved my issue.
The r variable seems to calculate the height of overlay then obviously adds 30px to it. Hence the find-box being in a fixed position off screen.