I have a Roku Ultra plugged to a Marantz AV8802A receiver, and in the last few days, since the 8.1 update was installed, I've been experiencing intermitent audio - as in, the receiver stops decoding the audio at random times (so the video continues playing, without audio, as if it had been muted), usually when watching something on Netflix. Changing the audio mode on the receiver (e.g. to music and back to movie) makes it come back to life, but it's become pretty annoying.
I have the Roku on the Auto setting for audio, and the Marantz reports it's using Dolby+ and/or DTS+ when this happens.
Any advice? I've seen other reports of audio issues but nothing that exactly matched this, but given the strong correlation with the OS update, it sounds like a bug. Help?