can't use "S" in normal mode with haskell-mode

Hello all, I use emacs-evil with haskell-mode. Whenever I enter the "S" hotkey a new buffer (haskell-mode's "Help" file) is opened on a split window and it gets stuck in <M> state. I can use the "S" hotkey fine when haskell-mode is not active, though. Any pointers? Thanks, -L