"bind ... movewindow, u" does not work

[RoughCookiexx]

I'm using dwindle layout. All of the following binds work, except when I want to move a window up.

bind = $mainMod CTRL, H, swapwindow, l
bind = $mainMod CTRL, J, swapwindow, d
bind = $mainMod CTRL, K, swapwindow, u
bind = $mainMod CTRL, L, swapwindow, r

bind = $mainMod CTRL SHIFT, H, movewindow, l
bind = $mainMod CTRL SHIFT, J, movewindow, d
bind = $mainMod CTRL SHIFT, K, movewindow, u    #DOES NOTHING
bind = $mainMod CTRL SHIFT, L, movewindow, r