So I earned a lunchbox with the achievements and inside it had random stuff, some unimportant weapon, etc. But it also had a dweller with pretty good stats and a ninja outfit. Well I killed off the most pathetic dweller to get him and he was in my vault, well about a day later today I realized my population is at 199 which it shouldn't be. So I look to see who's missing and sure enough it's my lunchbox guy. So I hope they can fix this bug because that really svcks. I already had that guy, so it's not like I never claimed him and he disappeared. I actually had him patrolling the door. Anyway it's making scared of buying lunchboxes if they're only going to disappear.