1. first CEC works
2. when I switch off TV and switch it on again: CEC still works
3. when I switch off TV and wait one night and switch on TV (several different type of TVs), KODI seems to be in a sleep mode and can´t be activated with the TV remote control
4. after I activate KODI with a USB Keyboard, I can reuse CEC without rebooting libreelec.