When I send dwellers to the wasteland for long periods of time, they usually use their RadAways and Stimpaks.
This time, I sent out a dweller with the maximum 25 RadAways and Stimpaks, with a Fatman and Heavy Wasteland gear. I have noticed that she heals, and that her radiation lowers, but her RadAway and Stimpak counters to not decrease.
She still has all 25 after 13 hours. I have watched the bars go up and down. I can not tell if this is deliberate, or a bug, but the movements are supported by the log.
Is it possible for dwellers to heal, and for their radiation to lower, by themselves?