Linux: showMinimized() works wrong with maximized windows

Steps to reproduce:
1) showMaximized()
2) showMinimized()
Result:
After call showMinimized() window will return to normal (nonMaximized) state, then will be minimized. After restoring from taskbar it will shown in normal state.
Expected result:
It must go to taskbar from maximized state immidiatly, after restoring from taskbar it must be restored in maximized state.