Thanks for this. I’ve been irritated since I noticed that this TV adjusts the brightness (or contrast or backlight or something) whenever the content goes from very dark to very light. I’ve changed EVERY setting related to brightness (and all of the eco settings) and it still happens.
However, since reading this and changing to Movie mode, it’s less noticeable (at least so far). I want to like this TV, but that was really annoying.