After all the good advise I received about the Sonos Soundbar and about the TCL TV, the issue was finally resolved by the TCL support. After doing a full system reset on the TV which is a pain and didn’t resolve anything, they had me unplug all the devices - satellite and DVD player as well as the Soundbar. I then plugged just the sound bar back in and tried the CEC setting. Then plugged the other two devices in and repeated the CEC step. I did this multiple times and the TV finally understood it! It has now retained that setting overnight. My advise to anyone else having these issues - it is the CEC devise settings on the TV that needs to be reset. Thank all for the helpful advise.