Regarding Customer Automatically logged out after payment

Question

I am facing one issue, May you please help ? I do added custom payment gateway its working fine but after payment done customer automatically gets logged out from application. What can be the issue. I also tried disabling Full page Cache but still facing same issue. I am using Magento 2.3.7 version.

Answer 1

It seems, your issue is related to the SameSite issue. Please refer the below links.

https://github.com/magento/magento2/issues/26377

https://support.magento.com/hc/en-us/articles/360049032952-Customers-get-logged-out-or-lose-cart-content-on-Magento-storefront

Solution: To solve the issue, contact the third-party service provider and request their developers update their integrations to configure cookie parameters.

Temporary workaround: To make your integration work while developers of the third-party service provider resolve the issue, you can set SameSite value to None. This can be done by configuring headers in Nginx or configuring this parameter via HTTP headers.