
In case you can't tell, at least 1 of those dead boars is in the shallow water. Floating.
I didn't have time to attempt to recreate the bug, but if it can be recreated, this could potentially be a very annoying bug - have people wreck boats holding runestones mid-river so that you can create a pretty effective river blockade, maybe? If necessary, I will try to find time to recreate the bug.
And sorry if this has already shown up, but my searching showed that it hadn't.