Xbox 1x causes loss of terrestrial channel 39

cerb

Very strange issue caused by Xbox 1x.

LG C8 TV connected with an Xbox 1 x via HDMI..works perfectly, even 4K HDR...but....whenever the Xbox is powered on the TV loses terrestrial TV channel 39(BBC 1 HD, BBC 2 HD , ITV HD)..other DTV channels are ok.

Anyone else seen anything like this?