Is this an exploit? grand heists

so i noticed in grand heists you can leave wings early and give all the loot to a friend who can put it all in his stash and as long as you dont put the wing in lockdown u can farm the entire wing and not risk losing any loot till you are actually ready to loot the target items. is this ok and NOT an exploit ?

Its not an exploit, and you dont need a friend.
Get some loot, go to Rogue Harbor to stash it, get back in.