I have this soundbar connected to my LG 49sk8500pla tv using the HDMI ARC, I have a Sky Q box connected to the soundbar on HMDI IN. When watching sky recordings, the audio regularly cuts out and I have to power off all three devices to regain audio. Please can anyone advise? Soundbar firmware is the latest release and all HDMI leads are brand new and are HDMI 2.1 compliant. Sky Q box also running latest software release. 

Thanks all.