" I think, custom keybindings must be start with key " to avoid overwriting default bindings. First key after " must be a first letter of the called entity. " For example, keybinding that calls *snippets* should starts with " + s (Snippets)" " Snippets let g:UltiSnipsExpandTrigger="s" let g:UltiSnipsJumpForwardTrigger="sn" let g:UltiSnipsJumpBackwardTrigger="sb"