Combo in Grid

Hi, I was testing a ComboBox into a Grid.

The result was that doesn't clear or hide the combo in the grid when you left clic into another cell of the grid and move around.

sintaxis:
var cboFav = new AW.UI.Combo;
cboFav.setId("myCombo");
cboFav.setControlText("Some text");
cboFav.setControlImage("favorites");
cboFav.setItemText(["Home", "Favorites", "Font", "Search"]);
cboFav.setItemImage[("home", "favorites", "fontsize", "search"]);
cboFav.setItemCount(4);
//instance the combo into the grid
obj.setCellTemplate(cboFav,1); // column-1, row-1