dynamic height on a data grid not working for 2.5.3

I am using AW version 2.5.3 for the data grid. I set the height property to auto using the
Below css

#myGrid.aw-grid-control {
height: auto;
width: 100%;
}

using Ajax call I am dynamically adding and removing rows from the grid and the height of the grid was calculated dynamically and set using the below command , This was working fine with my previous version 2.0.2 , I also disabled the vertical scroll bar.

AWobj.setStyle("height", height+ "px");


After updated 2.5.3 the height is setting correctly but few rows at the end disappears, please help