2 recent, weird and isolated issues with BD playback

I'm running a McIntosh MVP881BR.  The deck is now 4-1/2 years old and has the latest firmware update according to the internal check routine.  

First problem:  When I've tried to play 2 different 20th Century Fox BD movies (Abraham Lincoln - Vampire Hunter and The Martian), I get the disc error message "your player needs to be updated."  Those are the only 2 Fox BDs I've ever bought.  Everything else regardless of studio, new or old, plays.

Second problem:  When I've played 2 different discs with Dolby Atmos (Mad Max Fury Road and Mockingjay Part 2), I only get front left, center, front right and subwoofer.  They are the only 2 Dolby Atmos discs I have.  My McIntosh MAC-3 processor registers the input as surround and the rear channels are definitely live, just no signal. 

I'm very satisfied with my 881 and consider it the most musical disc player I've ever owned.  Audio CD, DVD-A, SACD performance and DVD up-sampling I feel is outstanding.  The MAC-3 is an older 5.1 unit updated by McIntosh not quite 4 years ago and works fine with every other disc or source I've ever run into it.  

I have a query into McIntosh, but would like to know if anyone else here has run into either of these things.