Audio cutting out with Samsung Soundbar on TV-ARC
So my parents just purchased a Samsung 60" 4k TV (model: UN60JU6500F) and a Samsung Soundbar (model: HW-J6000).
I have an HDMI cable running from my cable box into HDMI 1, and then I have an HDMI cable running from HDMI 3 (TV-ARC) to the HDMI ARC port on the soundbar.
Frustratingly, the audio will be fine for a bit and then it will just completely cut out. I cant seem to consistently reproduce it, and it doesn't occur after a set amount of time. Sometimes 1 minute in, sometimes 10 minutes in, sometimes when changing a channel, sometimes when turning Sports mode on or off, sometimes when doing nothing at all.
I know there are other ways to connect the soundbar, via Optical or the Soundcasting (I think it's called, the wireless audio casting), but I'd love to figure out the ARC method, so that my parents are only using one TV remote. They get a bit overwhelmed with multiple remotes, so I'd only like to use those other options as a last resort.
Can anyone offer some insight why this might be happening?