Pairing the XR15 remote with my Sony Sound Bar unpairs my LG TV

 I've been through the XR15 factory reset and several different ways to pair the remote with my box, TV and soundbar.  I cannot get the soundbar and TV to pair together.  Every time I pair the soundbar the TV becomes unpaired and then I re-pair the TV and it unparis the soundbar.  

I've tried everything posted on the Xfinity site here : https://www.xfinity.com/support/remotes

and I've read through and tried everything posted in the forum below:

https://forums.xfinity.com/t5/X1/X15-Remote-won-t-pair-to-TV-and-Sound-Bar-at-the-same-time/td-p/3130692

Please advise