Originally Posted by
Ualaa
If my camera angle is above and looking down, that will frequently cause them to move downwards as well as forwards, which pushes them through the surface of the water.
It is almost as if the game interprets that as both buttons were held, so it is movement in three directions, despite only the left button having been held for changing the camera angle/mouse look.
If you take the time to have the slaves all look straight ahead, they won't go down below the surface of the water, during Path of Frost.