No Audio on Universal 4k with ARC to Yamaha

I am using a Sony A9G with Arc to my Yamaha RX-A810 from a Sony UBP-X700. I have played a few 4k blu rays with no issues. Tonight I had no sound issue issue with 2 universal 4k blu rays - Field of Dreams and Apollo 13. Jaws works fine. The menu system has sound, the universal logo has sound, but when the movie starts, I get no sound. The audio options only allow different languages, DTS-X is the only format. Oddly, the bonus audio commentary will play if selected. Not sure what the issue is. I figured ARC can't pass DTS-X and since my receiver can't do eARC, that was the issue. The player a 2nd hdmi output just for audio. I ran a 2nd hdmi cable to the AVR and turned on the option to send audio through it. Still no audio. No matter what setting I use on the avr, it won't play sound. Any ideas? On a another note, if I change the speakers to TV internal, the sound plays through the TV. So, the player is reading the audio and sending it to the TV. The TV can play it, but can't send it to the AVR. If I send the audio straight to the AVR, still no sound.