No, it is not the player. It is the disk format. The newer format, called BD-J (Blu-Ray Java), does not allow resume, on any player. Some of the older blu-ray disks were created before BD-J. The great majority of all BD disks are BD-J. You must have gotten lucky and used an older BD disk.
Here is one site which explains this. http://www.sony-asia.com/support/faq/432547
Why can’t BD-J resume play?
Resume play won’t work because BD-J application in the disc disables the resume function. The Java software controls playback plus all the interactive content (like what Windows OS does on the computer). When you hit stop, or turn off the player, the Java application on the disc reboots in the next playback. This results in resuming playback from the beginning of the disc. Therefore you should use pause instead of stop for Blu-ray disc that supports BD-J application.
Could be. I just play what NetFlix sends me.
It might also be that I am succeeding because I am "not" using an actual "player", but a real Windows PC running software to play BRD's. Perhaps the folks who programmed that software know of the "java idiosyncrasy", and programmed around it. Certainly software packages are upgraded far more frequently than BRD player firmware.
I'll have to watch and take notes to see if I can tell which it is. Is there a way to specifically identify a disc as BR-J (trademark on disc, for instance)? If that question is answered at your link, then my apologies in advance, as I haven't yet read your link's info.