I had it happen randomly in a few public matches.
When leaving the disc control screen/mode Predator seems half/spotted cloak, literally.
I went into privates and recreated it. Previous weapons, locations dont seem to matter, you just have to have the disc control/flight screen end. It can hit walls or return to you, ends the same way.
Seems client side only for AI they don’t see you, I can’t tell or test if another player can half spot me or fully or not at all.