SKY Q, Sonos Beam and LG TV: Sound cutting out when changing channels

[P+Heywood]

Hi there - LG TV, Sonos Beam and SKY Q.

When shifting channels (maybe a little quickly) the sound will frequently cutout. It will sometimes be resolved by shifting a channel again, sometimes it comes back in of it's own accord... restarting the TV off/on will always do it.

Any ideas?

(I've replaced the HDMI cable to the soundbar once)