Hello,
I have a site of magento version 2.2.1 which runs two different websites having different domains. When I try to upgrade its magento version from 2.2.1 to any higher version through composer then I get redirection issue ie when I try to run second website then it redirects me on default website.
Also, there is no virtual symlinks to manage multiwebsites. So, how is it possible to run two websites in magento with two different domain using any magento settings and this settings remove after upgrading magento version.
I've also compared core_config_data table and there is no change in this table that can be cause of this issue.