This is not exactly a bug so I'm not posting it as a bug.
When you long rest, it affects everyone (of course). When you short rest in field, it affects only the party (of course).
Now, when you go to a camp and short rest there, it also affects only the party.
Should a short rest in a camp affect everyone? Then again, short rests are meant to be taken in field (wouldn't want players returning to camp just for short rests all the time). And maybe it should be assumed that when the party is short resting in the field, everyone else is resting too in the camp.
What do you think?