I cleared my 3rd base on my first brutal expedition, got expedition completed message but no expedition points, and the expedition reset to zero. Hopefully this doesn't keep happening else I would get no reward progress.
This happened to many other discord members as well. We confirmed that it happened to all of us on this specific Brutal expedition map.
That looks familiar actually, except I went round via the right-hand side nodes first. However, it also happened to the devs on the devstream and I think (?) they had a different node layout.