Available in LIB version: 2017.2.710

The fix is available in the R1 2018 Release.

The fix is available in the R1 2018 SP2 Release.

The default merging algorith merges adjacent cells with the same value. An option for preventing cells merging despite their value, should be provided.

I have a RadGridView and bind its ItemsSource and its SelectedItem to properties of the ViewModel (DataContext). I use a ViewModel for the grid items with overridden Equals and GetHashCode. When the ViewModel is created, the property bound to ItemsSource is filled and the property bound to SelectedItem is set to an item that is equal to one of the items in the collection (but not reference equal).

Problem:
When the GridView is displayed, no item is selected.

Note: I already reported this issue before: https://feedback.telerik.com/Project/143/Feedback/Details/227302-binding-itemssource-and-selecteditem-of-gridview-changes-selecteditem
but now I have managed to modify the sample project so that the problem can be reproduced. The difference to the original sample project is that Equals and GetHashCode of the Club ViewModel are overridden and the selected item is not reference equal to the item in the collection.

The issue can be solved with the help of the new added IsExpandableBinding property.