[Quicksilver] Cannot delete cart items when shipping to multiple addresses

Description

Scenario 1:
Steps to reproduce:

1. Go to Quicksilver sample site.
2. Add 3 different variants to a cart.
3. Proceed to check out -> Ship to multiple addresses.
4. Set item 1 deliver to address A, item 2 deliver to address B, item 3 deliver to address C -> Click Continue.
5. Click on mini cart
6. Click "X" icon to delete item 2 or item 3.

Expected:
item 2 or is deleted from cart.

Actual:
Cannot delete item 2 or 3 from cart.

Scenario 2:
Steps to reproduce:

1. Go to Quicksilver sample site.
2. Add a variant to a cart with quantity 3 (3 of the same variants).
3. Proceed to check out -> Ship to multiple addresses.
4. Set item 1 delivery to address A, item 2 delivery to address B, item 3 delivery to address C -> Click Continue.
5. Click on the mini cart
6. Click "X" icon to delete item 2 (delivery to address B) or item 3 (delivery to address C).

Expected: Item 2 or 3 is deleted.
Actual: Item 1(deliver to address A) is deleted.

Note: This bug does not happen in QS 10.2.0