I followed this article - https://medium.com/adobetech/customizing-the-aem-grid-3ff9c2121a36 for customizing my AEM Grid to different break point (small, medium, large, xlarge etc)
When I add a container and make this container as responsive - all components including container used to show 12 columns.
but with SP10 upgrade - the inner containers are not showing the 12 grid. This issue I observed after upgrade to Service Pack 10.