Stack merge bug

[Lumipharon]

Description

Adding a stack to a storage item WITH A DRAW DELAY (i.e. backpack) that already has a stack of that item inside will merge them.
Since the storage refactor however, the merge happens instantly, but a draw delay do_after appears, after which a ghost item is stored in the backpack, which cannot be removed in anyway, permenantly cursing the storage.

Test Merges

NA

Reproduction Steps

See above.

Screenshots

No response