To work around the issue, set the EnableColumnGroupsVirtualization property of RadGridView to True.

The problem should be resolved with Q1 2016.

When a SortDesciptor is applied and items are modified, the selection behaves inconsistently:

1. If an item is modified, so it's position needs to be changed according to the sorting descriptor, it will be removed from the SelectedItems.
2. If an item is modified, but it's position should remain the same, it remains in the SelectedItems collection.
2a. If IsSynchronizedWithCurrentItem item is set to true and the position should remain the same, the item is removed from the SelectedItems and the one that goes in the same position is added to the collection.

Workaround is to add the item back to the SelectedItems collection when RowEdit ends.

private void clubsGrid_RowEditEnded(object sender, GridViewRowEditEndedEventArgs e)
{
    (e.Source as RadGridView).SelectedItems.Add(e.NewData as Club);
}

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

Pasting in empty RadGridView is not possible.

The problem should be resolved with LIB version 2016.1.404.

Using Telerik GridView. If a cell is wrapped multi-lines (the more lines the easier to reproduce), and the grid has both vertical and horizontal scrollbars. 
1) Fill one of the cells with a bunch of text in which will cause multi-line text wrapping of within that column.
2) Set focus to a different grid row
3) scroll the vertical scrollbar all the way to the bottom
4) scroll the horizontal scrollbar far enough away to lose visual of the Column
5) scroll the horizontal bar back to the right
Result: the vertical scrollbar will jump.
Expected: The scrollbars should not jump like this as it does not happen when the cell does not contain word-wrapped text.