funmonkey100

I did also notice when I have both the internal speaker and digital out on at the same time it sent only stereo to the amp that was with Netflix app not sure about the hdmi inputs at the time only enabled digital out only as the fix for me.

I had this problem with the same TV It used to work and then was only outputting stereo to my amp. I found out the problem was the sound out output for optical/HDMI arc under digital sound out was set to PCM and needs to be changed to Auto. I hope this works for you.