"Undo" can't resume the item in the canvas

Steps:
1. Create Project... -> Qt Quick Project -> Qt Quick Application, then default to finish.
2. Go to "Design" view.
3. Drag and drop some item into the canvas, then delete it.
4. Ctrl + Z to "Undo" the delete operation.

Actual Result:
The item can't display in the canvas, although it has been added into the "Navigator".

Comments:
Can't reproduce 100%, but very high rate.