I believe there is a bug in the RadGridView when attempting to edit cells in frozen columns. Here is how to reproduce:
1. Freeze the first two columns of a RagDridView via code-behind.
2. Double-click on a cell in either of the first two frozen columns.
3. Don't enter a value in the cell.
4. Single-click on any other row to exit the editng of the cell.
5. Attempt to go back and double-click on the cell that was edited.
At this point, the cell will not go back into edit mode. Once a cell has been double-clicked and put into edit mode, it cannot be put back into edit mode again.
1. Freeze the first two columns of a RagDridView via code-behind.
2. Double-click on a cell in either of the first two frozen columns.
3. Don't enter a value in the cell.
4. Single-click on any other row to exit the editng of the cell.
5. Attempt to go back and double-click on the cell that was edited.
At this point, the cell will not go back into edit mode. Once a cell has been double-clicked and put into edit mode, it cannot be put back into edit mode again.