You are better off connecting the sound bar directly to the television.
Whenever I use my soundbar, Fox channel goes out of sync no matter what X1 Audio setting I choose for the HDMI output or the TV input. X1 restarts do not help. Other channels are fine. I’ve been troubleshooting this for weeks now...
find a 'talking head' channel and then use the TV's remote and locate the audio lip-sync menu. adjust the timing (+/-) until it is good. The adjustment affects only the current port.