I have updated to LibreELEC-S912.arm-18.104.22.168-fix-lost-audio.tar but I am having issues with this build. Every time I restart my U9, it defaults to 2160p and 420 10bit. If I change it back to 1080p or play a 1080p video, I lose picture because it defaults to 1080p 420, 10bit and my screen has trouble with that. if I manually change to 444 10bit and stop and start kodi using ssh, everything is fine till I reboot.
So basically, my TV is having a problem with 1080p and 420 10bit output but not 2160p 420 10bit and it seems that this build defaults to 420 10bit output and sometimes resets the resolution to 2160p after a reboot of the box.
Went back to 22.214.171.124 and everything is back to normal.