I was messing with my display settings.
I set it to run in 4k, and re-arranged my UI.
Then I decided the performance cost was not worth the extra prettiness, and set it back to 1080p.
Now my attrition counter seems to now appear.
I think what happened is that it "remembers" its position in the 4k setup, and this position is offscreen in 1080p.
So how do I reset this widgets position?