I have a new 55S535. Using the Roku App I had to change the Color Space setting from native to custom, due to a calibration. Every time I shut the tv off for a while and turn it back on, the TV doesn't remember the Color Space settings. It remembers gamma, temp, etc., but I have to cycle the Color Space from Native to Custom. I went in the app to delete the tv and re-registered the tv, I tried going from wired to wireless; no avail.Why doesn't it remember the expert picture settings? My 43S405 doesn't have this problem.
