Ever-decreasing screen real estate with dom empty / append

Ever-decreasing screen real estate with dom empty / append

Given a jqm 'page' containing some already-enhanced elements....

If I clone and store the 'role=content' portion of the DOM, empty the div, then restore the cloned DOM snippet, the usable 'content' area decreases in size each time (or the margins / padding keep increasing).

jsbin here

Am I doing something wrong ?