Refresh rate for scroll area in html widget (iBooks Author)

So, I am finding that within the html widget, the refresh rate of a scrolling area is lagging.
As someone scrolls, the scroll window is black before the content catches up and is viewable.
Any recommendations to fix this problem?

This is stripped down test code:
<!DOCTYPE HTML>
<html>
<head>
<meta name="viewport" content="width=1024px" />
<title>Test Scrolling Area</title>
<style type="text/css">
 body { overflow: hidden; background: #000; margin: 0px;}
 #section { position: absolute; }
 .bkgrd { position: absolute; }
 .list { width: 348px; height: 471px; position: absolute; top: 108px; left: 8px; overflow: scroll; -webkit-overflow-scrolling: touch; }
 .fill { width: 348px; height: 471px; overflow-x: hidden; overflow-y: scroll; background: transparent; font-size: 1em; font-family: "Optima" sans-serif; color: white; }
 .fill p.lineup { font-weight: bold; color: #fff; margin: 0;}
 .fill .head { font-weight: bold; color: #d40000; }
 .fill .normal { font-weight: normal; color: #fff; margin: 0;}
 .fill .head { font-weight: bold; color: #d40000; }
 .fill .date { color: #d40000; }
 .fill .city { font-weight: bold; }
</style>
</head>
<body>
<div id="section">
 <div class="bkgrd">
 <img src="images/bgrd.jpg" width="1024px" height="auto" />
 </div>
 <div class="list">
 <div class="fill">
 June 
 00 City, ST Really Long Venue Name 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Really Long Venue Name 
 00 City, ST Really Long Venue Name 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Really Long Venue Name 
 
 June 
 00 City, ST Really Long Venue Name 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Really Long Venue Name 
 00 City, ST Really Long Venue Name 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Venue 
 00 City, ST Really Long Venue Name 
 
 
 </div>
 </div>
</div> 
</body>
</html>

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