This is a well known and highly discussed issue to do with Lions Gate releases that use seamless branching and dolby true . Some have it worse than others and it is minor on my machine.Oppo says they can not fix with firmware as it is a hardware related issue, the chip is not powerfull enough.

DOG is GOD spelled backwards.
What others think of me is none of my business.
M80 V3 MY GLOSS Cherry