Hi.
I recently filed a bug report related to custom column controls (viewtopic.php?p=125543). This problem might be related.
See attached video clip demonstrating the problem.
When I double click a cell to edit it with my custom editor, the value is not shown in the editor. If I exit edit mode for the cell and double click it again, then the value is provided to the editor and shown.
Runnable sample also attached.