Change in Table-control are lost after scrolling

Hello,

I got a table control which is bound to an oData-model.

The table cells should be editable.

The problem is: When the content of a cell is changed, and you scroll up or down in the grid using the scrollbar, then all changes you've made are lost.

Is that a bug or a intended behaviour?

Could anybody confirm that?

Here's the coding o the table:

var oTable = new sap.ui.table.Table({
title: "Table Example",
visibleRowCount: 7,
firstVisibleRow: 3,
selectionMode: sap.ui.table.SelectionMode.Single
});

//Define the columns and the control templates to be used
oTable.addColumn(new sap.ui.table.Column({
label: new sap.ui.commons.Label({text: "Gender"}),
template: new sap.ui.commons.TextField().bindProperty("value","FIRSTNAME"),
sortProperty: "FIRSTNAME",
filterProperty: "FIRSTNAME"
}));

//Create a model and bind the table rows to this model
var oModel = new sap.ui.model.odata.ODataModel('/demo/services/test.xsodata/', false);

oTable.setModel(oModel);
oTable.bindRows("/userdata");

I've notived that this problem doesn't occure when using a JSONModel instead of a ODataModel.

Thanks for any input.