Made an account here just to say thank you.
I own the Nexbox A5. The ROM it came with was garbage. HEVC was a bit hit and miss. Some worked, others didn't. It also had weird issues with black colours.
I was about ready to sell the Nexbox until I came across this LibreELEC build. I honestly can't empathize how much of an improvement installing LibreELEC has been.
All of my HEVC videos work fine and I have had no frame drops or stutters. CEC also works.
My only issue is with version released after LibreELEC-S905.aarch64-7.0.2.007.zip, they have sound problems. The newer devel versions have a crackling sound issue when playing streams.
Apart from that I am really happy with the LibreELEC build for the Nexbox A5 S905X.
The other issue I have had is with WIFI. The WIFI sucked before, but with LibreELEC it really sucks. WIFI is alot worse with LibreELEC then it was on the Android ROM.
Honestly WIFI isn't a huge issue as I use Ethernet. Just surprised that it is a lot worse.