I’m not using Vero too much, but even in my short experience with it I had several issues with CEC, when it was not working. Just no any reaction to TV remote, had to use the one from Vero itself.
My setup is Samsung TV + Denon receiver. Never exprienced any CEC problems with RPi.
Due to this and some other issues I still using RPi.
Does something happen after updates are available?
I have the Vero set to download updates and show the overlay that they are available. When this happens CEC usually has stopped working. Works again after updates installed (at least if the update uses dpkg and exits kodi)