Have Pay Per View plugin enabled, and once people purchased it, and were redirected properly. They seem to be kicked out or forced to refresh the page, and the user doesn't have access to the payed content anymore.
Was able to notice after an hour the member made a purchase, the issue starts to occur, and the content gets protected again.
Maybe Hummingbirds cache is causing this issue. Have disabled the plugin at the moment. Please check the chat notes for more info.