Many actions do not work with shortcuts in 11.3

Hi,

It seems many shortcuts does not work even though I set them in Control Panel -> Keyboard Shortcuts.

For example, I have tried shortcuts for Toggle Window Maximized vertically as Ctrl + Alt + Up and Mod4 + Up and Alt + F3, but nether worked.

Some of the actions works well with shortcuts (such as Lock screen). Is there some place else I need to modify?

Joon