Hi guys, 
  
I Have the same problem as rocky1518 described. I tried to implementing the autoscroll via javascript and works perfectly in FF, Chrome, Opera e etc, but not work on IE. 
  
On IE, the export initiates normally when I position the chart on the  viewing area (via javascript), but on document scroll the export stop and only finish if i put again the chart on the viewing area manually. 
  
how I could solve this problem?