Okay...so if I'm understanding you...you go to use clairvoyance and the character you're attempting to use it on
just...disappears? Nothing else changes? Because what you should be seeing is something like this
, where the cartoony hedgetrimmer guy is
Raz, just how one of the characters sees him. You're still able to control Raz, but you have no control over the camera, and you're seeing him through the eyes of whoever you've used clairvoyance on.
If I'm understanding you right and the characters are just disappearing and you're not
getting a screen like the one I linked to, then...honestly, I'd say report it to either DoubleFine or Majesco, because that's a serious bug, and also one I don't think anyone's run into before.