Strange sound bar problem. I have a SkyQ 1TB box feeding a LG oled55G2 and LG G1 sound bar. Sky-tv connected by hdmi, tv-SBar connected by eARC through hdmi. SkyQ box set to uhd, Dolby digital 5.1. When I switch on the sound comes through, but every 5-6s I get a momentary drop out. If I cycle...