[Cart Rule] Incorrect discount amount applied for bundle products containing more than one option

[sky-hub]

Preconditions (*)

1. Magento 2.4 (probably older versions too)
2. Affects bundle products fixed cart discounts

Note: Because the $availableDiscountAmount is set to zero after processing the first item the other items will not have any discount applied.

Steps to reproduce (*)

1. Install Magento 2.4 with sample data
2. Create cart rule with fixed discount amount for whole cart (Ex: 50$)
3. Add a bundle product to cart (Example: http://local.magento2.com/sprite-yoga-companion-kit.html)
4. Navigate to checkout/cart page and check discount.

Expected result (*)

1. Cart discount should be 50$
   

Actual result (*)

1. Cart discount is 18.85$
   

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Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

Fixed in: #30953

[m2-assistant]

Hi @sky-hub. Thank you for your report.
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[m2-assistant]

Hi @eduard13. Thank you for working on this issue.
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[eduard13]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @eduard13. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @eduard13, here is your Magento Instance: https://38c0eef343abcbac9e211ba73cd2e7fe-2-4-develop.instances.magento-community.engineering
Admin access: https://38c0eef343abcbac9e211ba73cd2e7fe-2-4-develop.instances.magento-community.engineering/admin_2f53
Login: be072c71
Password: 2a671b8be465