“Year 12 Day 5, 12:01 You recovered 10 HP (12.82%) from using a Healing Stick.”
Took some damage doing a door, decided this was a decent time to earn that achievement. So I hit myself with a healing stick, but did not get the achievement points for it.
This isn't a time delayed achievement by any chance is it?
Probably just a broken achievement. Like Leave room, Leave a building, Hail, Leave a planet, Hyperspace travel and probably some more that I haven't tried yet.
I would guess that any of the achievements gained by using the position interface or travel have not yet been fixed. I believe they were broken when they updated the respective features and have not been added in to the new format.