Vertical scrollbar missing in IE11

Question

I love handsontable. So easy to use and so fast.

But I am stuck right now because I cannot get a vertical scrollbar to appear in IE11.

Here is the JsFiddle that shows the issue:

http://jsfiddle.net/Vaccano/uubL5azk/

If you run that in chrome or firefox you get a vertical scrollbar off to the side.

If you run in it IE11, there is no scrollbar.

The only thing I can think of that is non-standard with my setup is how I position the grid using this CSS:

.fill-client{
  position: absolute;
  bottom: 130px;
  width: 97%;
  top:190px;
  overflow: hidden;
}

Is there something I can change to allow me to use this kind of positioning and still get a scrollbar in IE11?