form_key cookie expires immediately if cookie lifetime is set to 0

[ekuusela]

form_key cookie expires immediately if cookie lifetime is set to 0. This causes for example the minicart remove button to not function.

Preconditions

Magento 2.1.8 with cookie lifetime set to 0, i.e. expire when the session ends.

Steps to reproduce

1. Set cookie lifetime to 0 in Stores -> Configuration -> General -> Web
2. Navigate to a product page and add a product to cart
3. Wait until the page has been fully loaded. Observe with browser dev tools that form_key cookie is not present.
4. Try to remove the product using the minicart.
5. Note that product is not removed.

Expected result

1. form_key cookie should be valid until session is closed.
2. minicart remove button should work.

Actual result

1. form_key cookie expires upon ajax request to /banner/ajax/load/?sections
2. minicart remove button does not work.

[magento-team]

Internal ticket to track issue progress: MAGETWO-71544

[magento-engcom-team]

@ekuusela, thank you for your report.
The issue is already fixed in develop branch
But we will consider to backport the fix to patch releases

[magento-engcom-team]

@ekuusela, thank you for your report.
The issue is already fixed in develop branch
But we will consider to backport the fix to patch releases

[magento-engcom-team]

Hi @ekuusela the issue is already fixed in 2.2.1 and will be available soon

[staradzinau]

Please, note: the issue is still reproduced on the 2.3.0, because of incorrect merge of modifications!

[magento-engcom-team]

Hi @TomashKhamlai. 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: 👇

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[bytes-commerce]

I still reproduce this issue in Magento ^2.4.x