So my Roku TV remote has been controlling my TV and Sonos Playbar for several years now. Unfortunately, the Roku TV remote died so ordered another one. I attempted to configure the new remote via the Sonos app to control volume but it won't register. If I unplug my TV from power, I can get the Roku remote to control the volume on the Sonos Playbar; however, as soon as restore power to the TV the remote stops working...any ideas?
Try refreshing the cec devices in your Roku tv settings:
settings> system> control other devices CEC> search for CEC devices> ok