In EPI Server CMS, I have managed the content area through the cascading feature (which is custom). If the user edits the top-level page and placed the blocks on the top page then it automatically inherited up-to child-level using cascade features and we can see the change in edit preview mode before to publish, but once page published and then add/remove the block from page then it does not show in edit preview mode, however after re-publishing the page I can see the changes.
Any idea why preview mode not working after publishing the page for blocks?