Editable ListBox cells: double-click and F2 do not focus the cell editor

Double-clicking a cell in an Editable ListBox column selects the row and opens the cell editor, but the editor does not receive keyboard focus, so typing does nothing until the cell is clicked a third time. Pressing F2 to start editing has the same problem: the editor appears but focus stays on the ListBox. Expected: editing begins with the editor focused and its existing text selected, ready to type over, as in a standard editable grid.