I’m a little confused about the versions 
… pre-installed CoreELEC 9.2. (not LibreELEC 9.2.), but the description indicates Armlogic- ng if you go to the site CoreELEC and try to download the update (not the initial installation) 9.2.1. there will be a choice of two groups of architectures Armlogic (“Amlogic” update file for all S905/S912 devices) and Armlogic-ng (“Amlogic-ng” update file is only compatible for S905X2/S922X/A311D devices currently) apparently mixed up architecture, it’s amazing how this device works.