Question Yamaha soundbar SR-C20A goes mute i/o shutdown

[michel_m]

Hi,
My soundbar used to work fine on HDMI CEC / ARC.
I changed TV set, and now my set-top box turns on the TV & the soundbar via HDMI CEC, but when turning off the box and the TV shutdown but the soundbar goes to mute instead of off..
The only change was the TV set, but as it is obviously from a newer generation. I don't get the reason why.
Any idea on what to look for?
Thanks...