Fallout shelter special training
I know that event responses are different, since characters go right back to their original assigned places. What I'm wondering is if you have a character in a training room and swap them out (say, for a child that just turned into an adult), do you lose all training progress?
No, you do not lose progress by swapping Dwellers out of training. They go back at the same remaining-time as they had when they were removed from the room.