If I enter a submode with the <Enter> key, previous mappings of <c-enter> and <s-enter> also enter the submode

[Flurrywinde]

I have: call submode#enter_with('fastmove', 'n', '', '<Enter>') in my .vimrc. I also have: nnoremap <S-Enter> [something] and nnoremap <C-Enter> [something], and now these mappings also cause me to enter my fastmove mode.