Fix Application stays minimized in the Taskbar in Windows 11/10

1. If a window won’t maximize, press Shift+Ctrl and then right-click its icon on the taskbar and select Restore or Maximize, instead of double-clicking on the icon.

Other Solutions To Try

1. Right-click on the desktop, select Refresh.
2. Press Win+M keys and then Win+Shift+M keys to minimize and then maximize all windows.
3. Press WinKey+Up/Down arrow key and see.
4. Press Alt+Space and see if the Maximize/Restore/Minimize, etc, box appears. If it does, use it.
5. The last step is to open Task Manager, kill the program process and start it again.