Unfortunately, we cannot what exactly is going on in your project based solely on your description of the behavior.
Can you please prepare a small dummy project that demonstrates this and we will immediately take a look at it. We need to have something that we can actually debug.
Thanks in advance. We are looking forward to hearing from you.
P.S. By the way, if you are simply changing the property of a data item, grid's will not listen for its PropertyChanged. You have to help them by calling RadGridView.Items.EditItem(dataItem), then change the propererty and then finally call RadGridView.Items.CommitEdit(). Maybe this can help you.
In case it does not, we will be waiting for your sample project.
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