Changing Adonis SplitKey setting breaks commands?

By changing the SplitKey setting from " " to “/”, things that only require two arguments such as “:fly/me” work, however for example “:ban/player/reason” will not work, saying it is “not a valid command”.

I’m confused because the example next to the setting is literally
-- The space in :kill me (eg if you change it to / :kill me would be :kill/me)

Am I doing something wrong? How do I fix this?

I have a heavily edited version of Adonis, however I can confirm with other projects that use the direct model, they also do not work with split key.