Hi!
One question, I would have an idea:
Noise reduction is enabled in Libreelec. That's a bit worse for picture quality. Would not it be worth disabling it?
/sys/module/di/parameters/nr2_en
The current value is 1 (on), 0 is off.
This function is called a smoke/ghost effect and the android is switched off several times. Image sharper and clearer a bit.
I also tested and seen the difference sometimes.
Sorry for my bad English.