no actually as seen in the movies the cloak takes a few seconds before it deactivates. (king willy kill) (P2 in slaughter house with sprinklers) (P1 coming out of water) (wolf coming out of water)
water deactivates the cloak. its pretty much like the predators cloaking device is like
circuits all over the body and if water touches it, it gets shorted out. not literately thought as the device is much more sophisticated.
so if it rained, no cloak lol
but you get the picture