I have an Apple TV 4K and Sony 4K blu-ray connected to my OLED65B7A with HDMI cables. My tv is connected to a Sony STR-DH750 receiver on the ARC input, also with HDMI. With the receiver set on Auto Format Direct. The receiver only puts out 2 channel stereo sound. If I connect the Apple TV and the blu-ray to my receiver, I get full surround sound. The problem is that the receiver doesn't pass through the HDR signal to the tv. It used to send the audio fine, but now I can't get it to pass through the proper audio signal. Is there a setting somewhere that may have been updated/changed with a firmware update that is causing it to not send through the full audio signal? How can I get full surround through ARC?