Window size is changed after minimize, move the window to a new position

Steps to reproduce:
1. compile and run the test app
2. when window is launched, its size is set (400,400).
3. minimize the window, maximize the window
->window size is not changed, which is expected.
4. minimize the window
5. from the WindowedApplication, set x, y position from slider, then click "Move Window" button
->it will move the window to a new position. However the window only shows the title bar
6. click the window task bar(for the window icon)
-> the window doesn't restore to its size(400,400).

Expected Results:
at step 5, it should not show the title bar, still be minimized.
at step 6, the window should be restored back to its size.

Workaround (if any):