ToME: the Tales of Maj'Eyal

With a frail network connection, when I try to store an item in the Vault, sometimes I receive an error according to which storing has failed (and thus giving my item back), whereas it actually succeeded (thus placing the item in the Vault). That causes the item to be duplicated, one going to the vault and the other staying in my inventory.
It is my guess that the confirmation of storing success from the server never reaches me.
That leads me to fear (I haven't experienced it yet, though) that the reverse thing can happen when trying to retrieve an item.

It should not, the game waits for server confirmation before deleting, so unless server really go bonkers it should be good