9.2.4.2 Discussion

[Portisch]

No it’s not Amlogic or S905X2, it’s Panasonic

Read about the forum. Most issues about CEC are related to Panasonic or AVR.
You can try a different libCEC version. Maybe it solves your issue:

How to configure used libCEC version

As CEC is implemented different on each hardware (TV brand/type) it may is needed to switch the used libCEC version to get a stable CEC handling for your CoreELEC device. Maybe a older libCEC version is working better with older TVs or vice versa. Any error found by libCEC can be reported at the developer site from Pulse-Eight: Different libCEC versions can be chosen by open a SSH connection to a CoreELEC device. By default libCEC version 4.0.4 is used. Revert any changes done to the use…