Bakery - Stock not updated when cart is changed

[dbs]

Bakery 1.84
WB 2.12.2 r379

Can't confirm.
Change in cart > button Update shopping cart > then a view in the stock administration (page reload) > result: like expected

But i see many "Undefined index: cust_state" (or country)

[CodeALot]

Bakery 1.84
WB 2.12.2 r378

If a visitor changes the number of items (or deletes the whole article) in the shopping cart, the stock administration is not updated.

For instance:
Stock = 10
Visitor adds 5 in the shopping cart
Stock =5
Visitor deletes article from shopping cart
Stock = 5

The same thing happens when a visitor abandons the order process.

Has anyone found a solution for this?