Forest Stalker walks onto the ocean if spawned on a boat

I'm not sure if this really needs to be fixed since there's no reason to do it in the first place (apart from curiosity, which is why I did it) and it has neither beneficial nor detrimental consequences, but it does look odd and jarring when it happens. If you place the Odd Skeleton on a boat and reanimate it, the Forest Stalker doesn't stay on the boat. Instead he walks away across the surface of the ocean, unless you use a Shadow Thurible to make him stay put. Then if you haven't thurible'd him and he's off having ocean time, when the sun comes up he collapses into a pile of floating fossils.