Yep... It was most odd that the OPPO BDP-10x players could do this but the newer UDP-20x players could not. It's the same with lossy AAC.My Oppo 203 does read FLAC 5.1 but does not read at all FLAC 7.1 (either gapless or not).
It was the main reason I went back to all my surround sound disc's and backed-up the native bit-streams instead (along with a .cue file)...