Clicking MDI Stay on Top window while another MDI window is maximized changes window state unexpectedly

In the MDI example:
1. Click New
2. Right-click the window titlebar and click "Stay on Top"
3. Click New
4. Maximize the window created in step 3
5. Click the window created in step 1 (it should be floating around the current maximized window)

Expected behaviour:
Focus changes to the floating window while leaving both windows in their normal/minimized/maximized states.

Actual behaviour:
When clicking on the floating window, the current window is restored and the "Stay on Top" window is maximized.