Why not abuse the game some more, blizzard already messed it up for everyone.
Here is how things flow.
A: person with resources
B: Crafter
-----Steps-----
1.A gives resources to B
2.B crafts items using them.
3.B gives crafted items to A
4.B moves to the new save point or waypoint
5.A leaves the room (When A leaves the room, A loses all crafted items received from B, but gets all resources back as well. Therefore, A lose nothing and gains nothing)
6.The room automatically terminated (server detects anomally?)
7.At this point, server lost the track of B giving crafted items back to A (from step 3), thus B still has crafted items. Therefore, B freely gets crafted items. (Because, A gets back resources)
Repeat
Simply put:
1.B crafts items using resources received from A.
2.A exits, and his inventory resets to the original state.
3.B still has crafted items
you have to be in a difficulty or area that person A has not been to yet. that way when you leave, the game resets and kicks all players.. this will not work if you are both in the same difficulty, it will just keep you in the game instead of kicking you. the best way is to have someone on a lv. 1 character do the stash trading of resources from like.. the end of act 1, that way when the creator leaves.. the lv. 1 is kicked out afterwards.
Fix it blizzard.