That's the question of the patch. It says "Underwater" and not "in the water". So, is it just when you try to swim away underwater and log, or is it no mater what, if your in the water and log, your coming right back to that spot.

If its under the water, then your going to have to surface after you elude under the water, and then auto swim and log. This opens you up to arrow fire when your above water and magic from on land, or those of us who can jump cast in the water.

Don't make me have'ta Troll ya Bro!