Can you please confirm exactly what’s happening with your mute list?
Just so that you know, if you’re seeing muted words in your “latest” feed, this is expected since you are following these users. If you follow a user and they post content with your muted words, the content will appear anyways. (Following users overrides mute lists)
If this is not the case, that you are seeing muted words from users you are not following, let me know.