Hi ds_tx - your head must be spinning right now.
To keep it short if you want the N2 to reboot you need to either completely disable the N2’s inbuilt CEC function or go the way of Uart reporting etc so the dev’s can figure what is going wrong. Unfortunately there isn’t any CEC ‘off’ switch in coreElec so it means editing the config.ini. follow this link: How to Edit config.ini?