They only show if u enable maco, borg or omega engine visuals, if u take em off they disappear.
As far as I can tell, the visuals work fine. It could be your video settings. I have Borg, Maco, and Omega engines on various toons - none of them have any issues with the visuals. Mind you, I also disable them because I don't like the idea of polluting my screen with unnecessary graphic spam even if I have a card capable of Ultra settings.