I have the UB9000, which I believe you're referring to -- it was the closest thing, build quality wise, to the Oppos, which, like you, I missed out on before the company closed up. I ended up getting a Cambridge Audio CXUHD, which was a clone of the UDP-203, but that gave me issues with DVD playback that their repair center could never fix, even after the unit went back twice. I am going to sell that when I can.
Getting back to the 9000 -- this thing, as with all Panasonic UHD players including the overpriced IMO 820, exhibits a TON of quirks which I can't stand, including the automatic power off after 20 minutes with no override, no aspect ratio controls, no zoom functions, no standby indicator on the front panel and the issue you brought up, the lack of resume playback functionality...
However, that last element I mentioned isn't really a "bug," as it's a known limitation with these Panasonics (i.e. they were designed this way); I ABSOLUTELY HATE the fact that these players don't have that resume feature (which Oppos and the Cambridge had, even in their first generation Blu-ray decks), as it came in VERY handy when resuming a disc you may have been watching the night before. As it stands, Blu-rays with Java encoding in them WILL remember where you left off the next time you put the disc in, wherein that message pops up "RESUME: YES/NO?" but this is strictly up to the DISC and the way it was authored; in the past, EVERY DVD at least would allow you to stop, eject a disc and then pick up where you left off the next time you power up the player -- but the Panasonics don't.
I know a million of these kinds of complaints were fired off to Panasonic reps via various sources, but they don't seem to care; one of the contacts I had claimed an upcoming firmware update should address at least some of these issues, such as the power-off-after-20-minutes thing, but I'm not holding my breath.