“Select Shipping Method” page of Multishipping Checkout is corrupted if a Customer use “go back” browser button to return to the page

[magento-engcom-team]

Preconditions:

• Magento EE 2.3.5-p2, EE 2.4.0, EE 2.4.0-p1, EE 2.4.1-alpha3{color} is installed, should be actule for CE
• A Simple product is created
• A Customer account with two shipping addresses is created
• Check / Money order Payment method is configured
• Flat Rate shipping method is configured

Steps to Reproduce:

• Go to the Storefront as the created Customer
• Add the created Product (2pcs) to the Shopping Cart
• Open the mini-cart
• Click the {color:#0747a6}“View and Edit Cart”{color} link
• Click the “{color:#0747a6}Check Out with Multiple Addresses”{color} link
• Select shipping addresses
• Click the “Go to Shipping Information” button
• Select Flat Rate shipping method
• Click the “Continue to Billing Information” button
• Click the "Add or remove gift cards" link on the “Billing Information” page
• Wait until the “Shopping Cart” page is loaded completely
• Click the “go back” browser button (left arrow)
• Click the {color:#0747a6}”Back to Shipping Information” link on the “Billing Information” page

Expected results:

• “Select Shipping Method” page should be loaded
• The page should not be corrupted

Actual results:

(/) “Select Shipping Method” page is loaded
(x) The page is corrupted 

[magento-engcom-team]

The issue was exported from the internal JIRA. The link to the original JIRA issue: https://jira.corp.magento.com/browse/MC-36425

[m2-assistant]

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• Steps to reproduce
• Expected and actual results

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[magento-engcom-team]

✅ Confirmed by @magento-engcom-team
Thank you for verifying the issue. Based on the provided information internal tickets MC-36425 were created

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