I am using default Ubuntu with Gnome 3.28.3-0ubuntu0.18.04.2
The shortcut to change workspaces up/down is Ctrl+Alt+Arrow_Up and Ctrl+Alt+Arrow_Down
And adding Shift to the combinations move the window with focus to the next (up/down) workspace, regarding the arrow key used.
This shortcut does not work anymore. Why?
Also, maybe related, other shortcuts with Shift are not working too.