When I close windowed mui app with red button, often it dont close but minimzed on taskbar.

But there are other problems, when two apps are snaping on the two halves of the screen, if I close one, the other disappears from the screen, the icon remains on the taskbar, but clicking on it does not open. Then I have to re-open another app, because everything returns to normal working. Or when I close one of the two snap windows, the other go to full screen, even if it is set to windowed.