What would the changes of this working on an s905x be? Currently running the kszaq libreelec 8.2 build installed to internal.
There are tons of changes compared to the build you are running as you are running Kodi Krypton and LibreELEC 9 is Kodi Leia... You can find more information from LibreELEC blog, Kodi Leia and so on. I highly advice you to upgrade if you are playing HEVC files, 4K etc as there are important changes for better playback.
And by the way, don't install LibreELEC to internal! Instead, read [HOWTO] Boot from SD card, use internal memory for data to boot from SD card/usb while using internal storage for Kodi! The booting time might take som seconds longer, yet the performance with Kodi is the same While it's more bulletproof and you can dual-boot other builds as Android etc