Having HDMI eARC issues with Yamaha RX-V6A and Samsung QE65QN94 (Same as QN90A but better viewing angles). When I got it all hooked up last night, Netflix worked flawlessly with Atmos. Different videos came up with Atmos symbol next to them like Lost In Space etc. Today, the same videos show 5.1 instead. The sound either just cuts out constantly or doesn't play at all. I have checked all settings, but nothing sticks out apart from sometimes audio pass through gets greyed out randomly.
Update 1: If I disable and enable Digital output for audio, sound works but it only shows PCM and pass-through is greyed out.
Update 2: I did a factory reset on TV, and everything started working. Netflix showed Atmos next to compatible videos. As soon as the amp goes off without switching the TV off (Amp timing out after no audio streams being detected for a certain period of time), that's when eARC issues kick in and all the above issues manifest. HDMI pass through completely stops working for Netflix and only PCM works.