If it was HDMI the video would go too, and not just one channel of audio.
I'm leaning toward amp protection shutdown, or a decoding error in the audio processor when being fed a bitstream source.
I have had the amp go into protection before, but always showing me the red led on the channel meter on the front. With this issue the meter is still blue and bouncing. I don't think it is the amp or the speaker. I think you may be onto something with the decoding. I run all the other devices through the same gear with no issues at all. All the issues have been on newer discs as well. I am updating my oppo now and there is a née firmware I did not have so maybe something there will help
