Hi!
I had a lot of problems with LibreElec 8.2.5 on RPi3 (two RPi3s). Even trying with versions 7.0.2. The same problems: rebooting nicely 2 or 3 times, and then blocked. Considered a problem with sd card, and problem with sd reader.
Finally, I tried with NOOBS install, and LibreElec 8.2.5 module on it. This way, it's working good.
Anyway, I'll check your downgrade to 8.9.003. (I'm confused, do you upgrade via command to 8.9.005?)