Transition from task menu to launcher looks: _MB_CURRENT_APP_WINDOW: window id # 0xffffffff (task menu) _MB_CURRENT_APP_WINDOW: window id # 0x0 (launcher) but from task menu to home: _MB_CURRENT_APP_WINDOW: window id # 0xffffffff (task menu) _MB_CURRENT_APP_WINDOW: window id # 0x0 _MB_CURRENT_APP_WINDOW: window id # 0x1c00005 (home) It's irrelevant for common user but it confusing my application. Could someone fix this bug or it's intentional and 0x0 doesn't indicate launcher?