Some believe it's due to a bug in Intel's SGX, but whatever the cause is, it has resulted in the full UHD disc rips of Patriot's Day, Inferno, and La La Land to find their way online. Can't wait for the MakeMKV update, I've got lots of UHD discs to buy!
https://torrentfreak.com/more-pirated-ultra-hd-blu-ray-disks-leak-online-but-mystery-remains-170612/
https://torrentfreak.com/more-pirated-ultra-hd-blu-ray-disks-leak-online-but-mystery-remains-170612/