This has happened to me on more than just a couple of occasions: I Vanish (Vanish itself is supposed to put me in the 'Stealth' stance, no?) but I don't actually enter Stealth mode (as in my bars don't change and I can't use Stealth specific abilities such as Cheap Shot or Garrote) and have to wait for the Vanish buff to end to actually enter Stealth mode. This usually leads to me unable to follow Blinds with Saps or quickly Vanish -> Cheap Shot someone. Is there a way around this, or has anyone even had this happen to them?
Note that this bug doesn't occur every Vanish, but far too often and costs me wins often.