Discount fixed amount whole cart applied mutiple time when customer use Check Out with Multiple Addresses

[hoangnm89]

Preconditions (*)

1. Fresh Magento 2.3.3

Steps to reproduce (*)

0. Create cart rule, no condition, action: Fixed amount discount for whole cart. Discount amount $10
1. Create account, create 2 addresses: address 1, address 2
2. Add 2 SKUs to cart: SKU1, SKU2
3. Check Out with Multiple Addresses
4. SKU1 ship to address 1, SKU2 ship to address 2
5. Place order
6. Magento auto split order into 2 orders.

Expected result (*)

1. First Order get discount $10.
2. Second Order should not get discount.

Actual result (*)

1. Both order get $10 discount, Total discount is $20

=============
According magento comment in code:
https://github.com/magento/magento2/blob/2.3-develop/app/code/Magento/SalesRule/Model/Rule/Action/Discount/CartFixed.php#L77

/**
 * prevent applying whole cart discount for every shipping order, but only for first order
 */
if ($quote->getIsMultiShipping()) {
    $usedForAddressId = $this->getCartFixedRuleUsedForAddress($rule->getId());
    if ($usedForAddressId && $usedForAddressId != $address->getId()) {
        return $discountData;
    } else {
        $this->setCartFixedRuleUsedForAddress($rule->getId(), $address->getId());
    }
}

=== UPDATE: Dec 04 ===
Please cover this case as well
SKU 1: 100$
SKU 2: 200$
Rule: Fix amount 150$ for whole cart(CartFixed)
i add to cart:
SKU 1 - qty 1
SKU 2 - qty 1
then checkout:
SKU 1 - address 1
SKU 2 - address 2

Expectation:

after checkout:
Sale Order 1: discount amount 100$
Sale Order 2: discount amount: 50$

[m2-assistant]

Hi @hoangnm89. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
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Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.3-develop instance - upcoming 2.3.x release

For more details, please, review the Magento Contributor Assistant documentation.

@hoangnm89 do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

---

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[m2-assistant]

Hi @krishprakash. Thank you for working on this issue.
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[cafefin]

@magento give me 2.3-develop instance

[magento-engcom-team]

Hi @cafefin. Thank you for your request. I'm working on Magento 2.3-develop instance for you

[magento-engcom-team]

Hi @cafefin, here is your Magento instance.
Admin access: https://i-25834-2-3-develop.instances.magento-community.engineering/admin
Login: admin Password: 123123q
Instance will be terminated in up to 3 hours.

[hoangnm89]

i can replicate the issue

[magento-engcom-team]

✅ Confirmed by @krishprakash
Thank you for verifying the issue. Based on the provided information internal tickets MC-29276 were created

Issue Available: @krishprakash, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.