I'm on a free trial of Cinemax through the Roku Channel, and the movie Three Billboards Outside Ebbing, Missouri plays with very quiet, inaudible dialogue. The score and ambient sounds are much louder. I've determined this is happening because the center (and rear) channels are not coming through on my Yamaha RX-V371 receiver.
Every other movie I've played on Cinemax through the Roku Channel is DD+ 5.1, and the sound is just fine. All channels come through on my receiver. I've tried removing power from my Roku Ultra 4640 (OS 9.0.0 build 4142-29) and other devices, but the problem still remains with Three Billboards Outside Ebbing, Missouri. I even tried setting my Roku to PCM Stereo output, but the dialogue is still inaudible with the score much louder. I also tried toggling Volume Leveling and Night Mode, but that had no effect.
I was planning to keep my Roku Channel Cinemax subscription after my free trial, but I won't if this movie file won't play correctly.
Edit: The movie is also playing incorrectly at the Roku Channel's website, so I'd think there'd have to be a problem with the file.