Aron Granberg Navmesh navigation not detecting objects on icosphere

Sorry if I’m being a bit of an idiot, but I’ve been tearing my hair out for a few days trying to get navigation working on a sphere, or something that resembles a sphere. At the moment I have managed to use Aron Granberg’s navigation system to set up this:

48426-screenie1.png

The path is being generated fine, however the navmesh does not seem to be accounting for the obstacle that is circled in red; is there any reason you can see or am I going about this problem completely wrong?

Navmesh settings:

This might be better asked in Granberg’s own forum.

Does the “obstacle” have a GraphUpdateObject component, and does the GUO actually block the graph? On the screenshot, it looks like the graph doesn’t register the object.