"Tanix TX3 Mini" update success.
Updated from 8.2.3.1 to 8.2.5 with "LibreELEC-S905.arm-8.2.5-Chroma.422.10bit.tar" (release date 2018-09-01 13:22)
First impression GOOD
Boot is aprox 10 seconds longer but since TX3 is running 24/7, doesn't really matter 
Tried a couple of HD - SD files and streams with and without subtitles - ALL OK