Item lost from mini cart when login with a new user

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.4 CE GA1, Master
• Component/s: Shopping Experience
• Labels:
  • QA-AUTOMATION
  • functional-tests
• Severity of Issue: Major
• Git Pull Request: https://github.com/liferay-commerce/liferay-portal/pull/599

Steps to reproduce:

• Go to CP -> Sites -> Sites
• Create a new site using Speedwell
• Go to CP -> Commerce -> Channels
• Enter the channel named "Speedwell Portal"
• Activate a payment method(e.g MoneyOrder)
• Enable Guest Checkout by clicking on the toggle named "Guest Checkout"
• Click "Save" button
• Assert that the Guest Checkout toggle is active
• In Health Checks, click on "Fix Issue" on "Guest Checkout Authentication"
• Save
• Go to CP -> User and Organizations -> Users
• Create a new user([e-mail])
• Go to Memberships -> Sites -> Click “Select” -> Click on “Speedwell”
• Click “Save”
• Go to Password -> Set a password
• Click “Save”
• Logout
• Enter Speedwell site from URL http://localhost:8080/web/speedwell
• Go to Speedwell topbar button -> Catalog
• Add a product to cart(e.g. U-Joint) and select a quantity(e.g. 1)
• Open Speedwell account dropdown
• Click on “Sign In”
• Login as an existing user([e-mail])
• Go to the Catalog page
• Open the mini-cart
• Assert that guest cart is transferred to account cart

Actual result:
Item in Mini Cart will be lost. If buyer is not the first time to login. The item in Mini Cart still exist as expect

Catch by: https://testray.liferay.com/home/-/testray/cases/1263304172