If you are in the middle of sending someone out to explore and an incident occurs (e.g. raiders/fire/roaches) and you continue to drag your guy outside, you lose all the equipped Stim Packs and Rad-Aways when the incident ends and your would-be explorer is reset.

E.g., I have 65 Stims and Rad-Aways, I put 25 and 20 on my dude and after the incident is resolved, my would-be explorer has to be sent outside again and loaded up with Stims and Rad-Aways again, except now I only have 40 and 45 left, the 25/20 I loaded onto the guy has disappeard.

Has happened to me 3-4 times.

Thanks.

It was my understanding that, though they couldn't be seen, the Stims/Rad-aways were still there?

People have been using it to bypass the normal http://www.gamesas.com/topic/1525564-exploring-with-50-stimpaks-and-50-radaways-trick/; unless the recent update has changed the way it works.

So that would mean my explorer would have 50 stim-packs once outside? I have seen a couple of my explorers with more than 25 when outside and wondered if they found a super cache. Your explanation makes sense (that the stims are still loaded but not visiible), but it is still a bug in that if you don't end up sending that dweller outside, you have 25 invisible stim packs with an unmarked vault dweller!