I can't seem to get the leader key space working in help modes here's my general-define-key output

(general-define-key
   :states '(normal visual insert emacs)
   :keymaps '(global help)
   :prefix "SPC"
   :non-normal-prefix "M-SPC"

but in the help-mode (I have an alias set up for help as (add-to-list 'general-keymap-aliases '(help . help-mode-map))

spc doesn't seem to be mapped