We're using an igGrid (currently v12.1) applied to a <table id="dropDown"> element inside a <div> as the drop-down for a custom comboBox:

$("#dropDown").igGrid({
                autoGenerateColumns: false,
                dataSource: myDataSource,
                primaryKey: myPrimaryKey,
                columns: myColumnHeaderInfo, // This has some hidden columns
                width: "100%",
                height: "100%",
                autofitLastColumn: true,
                autoFormat: true,
                caption: "Drop-down Caption",
                tabIndex: -1,
                features: [
                    {
                        name: 'Selection',
                        mode: "row",
                        rowSelectionChanged: gridMainTable_RowSelectionChanged
                    }
                    , {
                        name: "Sorting",
                        type: "local"
                    }
                    , {
                        name: 'Resizing'
                    }
                ]
            });

 During the keyDown event on an <input>, pressing the "down" key (keyCode = 40) increments the selected row index:

var row = $("#dropDown").data("igGrid").selectedRow();
$("#dropDown").igGridSelection("selectRow", row.index + 1);

This selects the proper row, but does not fire the rowSelectionChanged event (handled by gridMainTable_RowSelectionChanged).

Are we doing something wrong or is this behavior as-designed?  Is there a better way to do this?