Invalid Form Key on catalog sorting when Remember Category Pagination and cache are enabled

[mrk-dzie]

Preconditions (*)

1. Remember Category Pagination option is enabled
2. Cache is enabled
3. Magento 2.4 or Magento 2.3.1+

Steps to reproduce

1. Enable Full Cache and Remember Category Pagination option (catalog/frontend/remember_pagination)
2. Visit any category page that contain products
3. Remove cookies (or use incognito mode) and visit the same category page again.
4. Try to change product list direction or order (the request is send by POST method and contains cached formKey not the one stored in cookies)
   Or try to change pagination count

Expected result

The toolbar action changes sorting direction and no error is displayed when cache and Remember Category Pagination are enabled

Actual result (*)

When the Remember Category Pagination option is enabled the toolbar widget is using POST method (Magento/Catalog/Block/Product/ProductList/Toolbar.php:752) and the form key is grabbed from possibly cached "formKey" options parameter. That will result an error (Invalid Form Key. Please refresh the page.) on toolbar action when full page cache is enabled and the product listing page is already cached by another user.

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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”.

[m2-assistant]

Hi @mrk-dzie. Thank you for your report.
To speed up processing of this issue, make sure that you provided the following information:

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• Information on your environment
• Steps to reproduce
• Expected and actual results

Make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, Add a comment to the issue:

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[mrk-dzie]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @mrk-dzie. Thank you for your request. I'm working on Magento instance for you.

[magento-deployment-service]

Hi @mrk-dzie, here is your Magento Instance: https://ed11299acd4f2befee67710bd8ae384f-2-4-develop.instances.magento-community.engineering
Admin access: https://ed11299acd4f2befee67710bd8ae384f-2-4-develop.instances.magento-community.engineering/admin_f334
Login: 9cc06123
Password: 1b33bb75921d

[mrk-dzie]

The issue is reproducible on the vanilla Magento instance

[m2-assistant]

Hi @engcom-Hotel. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).

  Details

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[engcom-Hotel]

Hi @mrk-dzie,

Thank you for reporting the issue.
We are able to reproduce it on Magento 2.4-develop/2.4.3/2.4.3-p1. As we followed your steps to reproduce this bug.

• Enable Full Cache and Remember Category Pagination option (catalog/frontend/remember_pagination)
• Visit any category page that contains products
• Remove cookies (or use incognito mode) and visit the same category page again
• Try to change product list direction or order (the request is send by POST method and contains cached formKey not the one stored in cookies)
• Or try to change pagination count.

Hence confirming this issue.

Thanks