I’ll take a listen today in Atmos 7.1.4 and give feedback
I had a short listening session today. There’s not that much activity in the rears on that R.E.M. Atmos album but there’s a lot of discrete sound in the overhead speakers. I turned off the main 5.1 speakers to listen to the ceilings and rears. On the first track there was acoustic guitar only (nothing else) in the front left ceiling speaker. No voice or any other bleed.
Overall it was a pleasing experience but it was only a few samples from 4 or 5 tracks from the album.
I’ll spend more time tomorrow.