[GAMEPLAY] bug with the warrior enchantment

Yesterday i was playing as Riven (, ) and bought a early. In lategame i tryed to upgrade my into another item and i was suprised because the jungle items were aviable too... So i bought and the item appeared in my inventory for a second then disappeared. So i lost my and the upgrade cost too. I know that jungle items are not allowed to buy without having but i don't think that this is how it should work.