Trade offer with error http://gyazo.com/31c7c8fe7f3a20720af460226604a5cd
Trade happened http://gyazo.com/b72ea36d03fa3d45d5a5ddc9756ed0fd
Item is in bot's inventory http://gyazo.com/ed67bef929cbf031aa4ab50cafb99242
Not in my dispenser inventory http://gyazo.com/88e1452ebd1943cc48d31476901522e7

Upd - resolved

While still waiting for response, I'll add that previous AC3 copy traded fine throught Dispenser (I deposited it before trade offers were implemented), and last copy is still sitting in my invetory (in before revoke suggestion).