I think I might have triggered that ambient mode bug. It only effects my Standard picture mode though. The Standard picture mode will dim after a few seconds, but none of the other picture modes are effected. I will try switching the auto brightness off when I get home, otherwise I'll have to do the factory reset. For others who had the issue, did it effect all of your picture modes or just the one mode like mine?
Speakers: Paradigm Monitor 9's, CC-290, ADP 190's, Sub: Outlaw LFM-1 EX, Receiver: Denon AVR-X4500H, Televisions: Samsung QN75Q90RAFXZA, Sony XBR-49X900E, Blu-ray Player: Panasonic - DP-UB820, Region Free Blu-ray Player: Oppo 103D