IvanPiacun:
With version 57.11 of the firmware of VTV and HDMI CEC fully on, on a Sony Bravia KDL-60EX720 TV, I have found getting it back into synch is easy just by aiming the remote correctly at the TV, turning it off and then turning it back on again until back in synch. You may find it works better in the future for you if you already have HDMI CEC turned on with future releases of firmware. In the meantime you can get them back into synch by covering the front of the remote with your hand and using the power button to just control the VTV.
Thanks but we are simply not interested in faffing around trying to figure out whether the sync is 1,1 or 0,1 or 1,0 or whatever - and covering the front of the remote etc etc. We will just turn on the TV. If VTV is still on because it hasn’t gone into standby, all good. If VTV is off/standby, we’ll pick up the VTV remote and turn it on. Life’s too short .....