Yes, you can disble it in Libreelec but in uboot is still activated.
As I read in other forum, to solve the problem we have to disable it in uboot.
At the moment I have no idea how to do that. A quick Google mentioned something about recompiling and I don't have these skills (just yet).
Does it behave the same with CEC Adapter (in Input Devices) Enabled?
Yes, unfortunately it does. That's why I disabled it in the first place, since I don't use CEC anyway.
I have 2 Tanix TX5 and 4 X96 boxes (all S905X based) running LibreELEC 8.2.3.1 and they all exhibit the same behavior. For instance, as soon as I power down my Tanix TX5 (with libCEC Adapter in Input Devices disabled!!) the CEC signals from my TV to my receiver are blocked. When I start NetFlix in my TV, it should change the source to the HDMI audio return channel, but that doesn't work anymore. Also, my TV should turn on/off my receiver, but that also stops working with the box powered down. As soon as I unplug the power to the TX5, everything works properly again. Therefore I never turn my boxes off. But it would be nice and more energy friendly if you could just power the boxes down with CEC issues.
