Like many electrical items out there. Maybe, maybe not depending if it was activated while wet, submerged, shark attack, jellyfish sting whatever. Heck, I guess a full moon could be an issue too...somehow.
In my experience, I have rinsed in fresh water, opened it up and allowed to air dry while rotating it around to avoid water sitting while drying and giving the false sense that after a few hours/days, it should be dry.
Try it and see...won't know till you try.