My child created folders of different categories in his iPad and iPhone and then categoried all the installed Apps. Recently, I installed Norton Family (NF) in his devices. When NF "Instant lock" or "Daily time limit" function is on, the Apps inside the devices were rendered invisible. After using these functions, the Apps became visible; however, all Apps were uncategoried. That meant apps that were categoried and put inside folders were now "released" and Apps dispersed in Home page or Program page as if they were not categoried.