Navigation path sometimes goes through obstacle

Strangely, sometimes the path found goes through impenetrable objects.

You'd need to have a look at the debug visualisation to see what the generated octree looks like at that point, hard to say any more just from that screenshot I'm afraid.

Management of the project has decided not to use any path finding / navigation approach, so my activity on UESVON is at least postponed. If / When I return, I hope to dig into viz debugging deeper.